A Typical Homework (a.k.a Shi Xiong Bang Bang Mang)

?UVA - 12412?

題目傳送門

emmmm，不想表達什么，udbug上的數據全過，可就是WA。。。。

AC了的代碼（大佬的代碼）

#include <bits/stdc++.h> using namespace std;const string subject[4]={"Chinese","Mathematics","English","Programming"};struct abc{string sid,cid,name;int goal[4];int tot; };int ope; vector<abc> v; vector<abc> temp; map<string,int> ranking;void output_message(){cout<<"Welcome to Student Performance Management System (SPMS)."<<endl<<endl;cout<<"1 - Add"<<endl;cout<<"2 - Remove"<<endl;cout<<"3 - Query"<<endl;cout<<"4 - Show ranking"<<endl;cout<<"5 - Show Statistics"<<endl;cout<<"0 - Exit"<<endl<<endl; }void tip(int idx){if (idx==1) cout<<"Please enter the SID, CID, name and four scores. Enter 0 to finish."<<endl;if (idx==2) cout<<"Please enter SID or name. Enter 0 to finish."<<endl;if (idx==3) cout<<"Please enter SID or name. Enter 0 to finish."<<endl;if (idx==4) cout<<"Showing the ranklist hurts students' self-esteem. Don't do that."<<endl;if (idx==5) cout<<"Please enter class ID, 0 for the whole statistics."<<endl; }bool found_student_by_sid(string sid){for (abc temp:v) if (temp.sid==sid) return true;return false; }int _remove(string par,int p){int cnt = 0;vector<abc> newv;newv.clear();for (int i = 0;i < (int) v.size();i++){if ( (p==0 && v[i].sid == par) || (p==1 && v[i].name == par) ){cnt++;}else newv.push_back(v[i]);}v.resize((int)newv.size());v = newv;return cnt; }bool cmp(abc a,abc b){return a.tot>b.tot; }int main(){//freopen("/home/ccy/rush.txt","r",stdin);//freopen("/home/ccy/rush_out.txt","w",stdout);ios::sync_with_stdio(0),cin.tie(0);while (1){output_message();cin >> ope;if (ope==1){while(1){tip(1);abc temp;cin >> temp.sid;if (temp.sid=="0") break;temp.tot = 0;cin >> temp.cid >> temp.name;for (int i = 0;i < 4;i++){cin >> temp.goal[i];temp.tot+=temp.goal[i];}if (found_student_by_sid(temp.sid))cout<<"Duplicated SID."<<endl;elsev.push_back(temp);}}if (ope==2){while (1){tip(2);string s;cin >> s;if (s=="0") break;int p = 0;if (s[0]>='A' && s[0]<='Z') p = 1;cout<<_remove(s,p)<<" student(s) removed."<<endl;}}if (ope==3){while (1){tip(3);string s;cin >> s;if (s=="0") break;temp.resize((int)v.size());for (int i = 0;i < (int)v.size();i++) temp[i] = v[i];sort(temp.begin(),temp.end(),cmp);for (int i = 0;i < (int)v.size();i++){int cur = i+1,j = i;ranking[temp[i].sid] = cur;while (j+1<(int)v.size() && temp[j+1].tot==temp[i].tot) {j++;ranking[temp[j].sid] = cur;}i = j;}int p = 0;if (s[0]>='A' && s[0]<='z') p = 1;for (int i = 0;i < (int)v.size();i++){if ( (p==0 && v[i].sid == s) || (p==1 && v[i].name==s) ){cout<<ranking[v[i].sid]<<" ";cout<<v[i].sid<<" "<<v[i].cid<<" "<<v[i].name<<" ";for (int j = 0;j < 4;j++) cout<<v[i].goal[j]<<" ";cout<<v[i].tot<<" ";cout<<fixed<<setprecision(2)<<1.0*v[i].tot/4.0+(1e-5)<<endl;}}}}if (ope==4) tip(4);if (ope==5){tip(5);string s;cin >> s;for (int i = 0;i < 4;i++){int cntb60 = 0,cntl60 = 0,tot =0,cnt = 0;for (int j = 0;j < (int)v.size();j++){if (v[j].cid==s || s=="0"){if (v[j].goal[i]>=60){cntb60++;}else cntl60++;tot+=v[j].goal[i];cnt++;}}cout<<subject[i]<<endl;cout<<"Average Score: ";cout<<fixed<<setprecision(2)<<1.0*tot/(1.0*cnt)+(1e-5)<<endl;cout<<"Number of passed students: "<<cntb60<<endl;cout<<"Number of failed students: "<<cntl60<<endl;cout<<endl;}cout<<"Overall:"<<endl;int cnt[5]={0};for (int i = 0;i < (int)v.size();i++)if (v[i].cid==s || s=="0"){int temp = 0;for (int j = 0;j < 4;j++){if (v[i].goal[j]>=60) temp++;}cnt[temp]++;}cout<<"Number of students who passed all subjects: "<<cnt[4]<<endl;for (int i = 3;i >= 1;i--) cnt[i]+=cnt[i+1];for (int i = 3;i >= 1;i--)cout<<"Number of students who passed "<<i<<" or more subjects: "<<cnt[i]<<endl;cout<<"Number of students who failed all subjects: "<<cnt[0]<<endl;cout<<endl;}if (ope==0){break;}}return 0; }

我的WA了的代碼（心塞）

#include <cstdio> #include <iostream> #include <algorithm> #include <cmath> #include <cstdlib> #include <cstring> #include <map> #include <stack> #include <queue> #include <vector> #include <bitset> #include <set> #include <utility> #include <sstream> #include <iomanip> using namespace std; typedef long long ll; typedef unsigned long long ull; #define inf 0x3f3f3f3f #define rep(i,l,r) for(int i=l;i<=r;i++) #define lep(i,l,r) for(int i=l;i>=r;i--) #define ms(arr) memset(arr,0,sizeof(arr)) //priority_queue<int,vector<int> ,greater<int> >q; const int maxn = (int)1e5 + 5; const ll mod = 1e9+7; struct node {char SID[15];int CID;char name[15];int Chi;int Eng;int Math;int Pra;int all;double average;bool ju;int paiming;int numpass;int id; }Stu[1000]; bool cmp(node a,node b) {return a.all>b.all; } bool cmp1(node a,node b) {return a.id<b.id; } int cnt; void miue() {printf("Welcome to Student Performance Management System (SPMS).\n\n");printf("1 - Add\n");printf("2 - Remove\n");printf("3 - Query\n");printf("4 - Show ranking\n");printf("5 - Show Statistics\n");printf("0 - Exit\n\n"); } int choice_1() {printf("Please enter the SID, CID, name and four scores. Enter 0 to finish.\n");char a[15];char nape[15];int b;int c1,c2,c3,c4;scanf("%s",a);if(a[0]=='0'&&strlen(a)==1)return 0;scanf("%d %s %d %d %d %d",&b,nape,&c1,&c2,&c3,&c4);rep(i,1,cnt) {if(strlen(Stu[i].SID)!=0&&Stu[i].ju==false) continue;if(strcmp(Stu[i].SID,a)==0) {printf("Duplicated SID.\n");return 1;}}cnt++;strcpy(Stu[cnt].SID,a);Stu[cnt].CID=b;strcpy(Stu[cnt].name,nape);Stu[cnt].Chi=c1;Stu[cnt].Math=c2;Stu[cnt].Eng=c3;Stu[cnt].Pra=c4;Stu[cnt].all=c1+c2+c3+c4;Stu[cnt].average=(double)Stu[cnt].all/4.0;Stu[cnt].ju=true;int k=4;if(c1<60) k--;if(c2<60) k--;if(c3<60) k--;if(c4<60) k--;Stu[cnt].numpass=k;Stu[cnt].id=cnt;return 1; } int choice_2() {printf("Please enter SID or name. Enter 0 to finish.\n");char s[15];int num=0;scanf("%s",s);if(s[0]=='0'&&strlen(s)==1) return 0;if(s[0]>='A'&&s[0]<='Z'){rep(i,1,cnt) {if(Stu[i].ju==false) continue;if(strcmp(Stu[i].name,s)==0) {Stu[i].ju=false;num++;}}}else {rep(i,1,cnt) {if(Stu[i].ju==false) continue;if(strcmp(Stu[i].SID,s)==0) {Stu[i].ju=false;num++;}}}printf("%d student(s) removed.\n",num);return 1; } int choice_3() {sort(Stu+1,Stu+cnt+1,cmp);int np1=1,np2=1;int nape;int i=1;while(!Stu[i].ju) i++;Stu[i].paiming=np1;nape=Stu[i].all;i++;for(;i<=cnt;i++) {if(Stu[i].ju==false) continue;else {if(Stu[i].all==nape) {Stu[i].paiming=np1;np2++;}else {np2++;nape=Stu[i].all;Stu[i].paiming=np2;np1=np2;}}}sort(Stu+1,Stu+1+cnt,cmp1);printf("Please enter SID or name. Enter 0 to finish.\n");char s[15];scanf("%s",s);if(s[0]=='0'&&strlen(s)==1) return 0;if(s[0]>='A'&&s[0]<='Z'){rep(i,1,cnt) {if(strcmp(Stu[i].name,s)==0&&Stu[i].ju==true) {printf("%d %s %d %s %d %d %d %d %d %.2f\n",Stu[i].paiming,Stu[i].SID,Stu[i].CID,Stu[i].name,Stu[i].Chi,Stu[i].Math,Stu[i].Eng,Stu[i].Pra,Stu[i].all,Stu[i].average);}}}else {rep(i,1,cnt) {if(strcmp(Stu[i].SID,s)==0&&Stu[i].ju==true) {printf("%d %s %d %s %d %d %d %d %d %.2f\n",Stu[i].paiming,Stu[i].SID,Stu[i].CID,Stu[i].name,Stu[i].Chi,Stu[i].Math,Stu[i].Eng,Stu[i].Pra,Stu[i].all,Stu[i].average);}}}return 1; } void choice_4() {printf("Showing the ranklist hurts students' self-esteem. Don't do that.\n"); } void choice_5() {printf("Please enter class ID, 0 for the whole statistics.\n");int ClassID;double num=0.0;double allC=0.0;double allM=0.0;double allE=0.0;double allP=0.0;double aveC=0.0;double aveM=0.0;double aveE=0.0;double aveP=0.0;int numPC=0,numPM=0,numPE=0,numPP=0;int numFC=0,numFM=0,numFE=0,numFP=0;int pass4=0,pass3=0,pass2=0,pass1=0,pass0=0;scanf("%d",&ClassID);if(ClassID!=0) {rep(i,1,cnt) {if(Stu[i].ju==false) continue;if(Stu[i].CID==ClassID) {allC=allC+Stu[i].Chi;allM=allM+Stu[i].Math;allE=allE+Stu[i].Eng;allP=allP+Stu[i].Pra;if(Stu[i].Chi>=60) numPC++;else numFC++;if(Stu[i].Math>=60) numPM++;else numFM++;if(Stu[i].Eng>=60) numPE++;else numFE++;if(Stu[i].Pra>=60) numPP++;else numFP++;if(Stu[i].numpass==4) pass4++;if(Stu[i].numpass==3) pass3++;if(Stu[i].numpass==2) pass2++;if(Stu[i].numpass==1) pass1++;if(Stu[i].numpass==0) pass0++;num++;}}}else {rep(i,1,cnt) {if(Stu[i].ju==false) continue;allC=allC+Stu[i].Chi;allM=allM+Stu[i].Math;allE=allE+Stu[i].Eng;allP=allP+Stu[i].Pra;if(Stu[i].Chi>=60) numPC++;else numFC++;if(Stu[i].Math>=60) numPM++;else numFM++;if(Stu[i].Eng>=60) numPE++;else numFE++;if(Stu[i].Pra>=60) numPP++;else numFP++;if(Stu[i].numpass==4) pass4++;if(Stu[i].numpass==3) pass3++;if(Stu[i].numpass==2) pass2++;if(Stu[i].numpass==1) pass1++;if(Stu[i].numpass==0) pass0++;num++;}}if(num!=0) {aveC=allC/num;aveM=allM/num;aveE=allE/num;aveP=allP/num;}else aveC=aveM=aveE=aveP=0;printf("Chinese\n");if(aveC!=0) printf("Average Score: %.2lf\n",aveC);else printf("Average Score: -nan\n");printf("Number of passed students: %d\n",numPC);printf("Number of failed students: %d\n\n",numFC);printf("Mathematics\n");if(aveM!=0) printf("Average Score: %.2lf\n",aveM);else printf("Average Score: -nan\n");printf("Number of passed students: %d\n",numPM);printf("Number of failed students: %d\n\n",numFM);printf("English\n");if(aveE!=0) printf("Average Score: %.2lf\n",aveE);else printf("Average Score: -nan\n");printf("Number of passed students: %d\n",numPE);printf("Number of failed students: %d\n\n",numFE);printf("Programming\n");if(aveP!=0) printf("Average Score: %.2lf\n",aveP);else printf("Average Score: -nan\n");printf("Number of passed students: %d\n",numPP);printf("Number of failed students: %d\n\n",numFP);printf("Overall:\n");printf("Number of students who passed all subjects: %d\n",pass4);printf("Number of students who passed 3 or more subjects: %d\n",pass3+pass4);printf("Number of students who passed 2 or more subjects: %d\n",pass2+pass3+pass4);printf("Number of students who passed 1 or more subjects: %d\n",pass1+pass2+pass3+pass4);printf("Number of students who failed all subjects: %d\n\n",pass0); } int main() {#ifndef ONLINE_JUDGEfreopen("in.txt", "r", stdin);#endif//freopen("out.txt", "w", stdout);//ios::sync_with_stdio(0),cin.tie(0);int idx;miue();while(scanf("%d",&idx)&&idx){int nape;if(idx==1) {while(1) {nape=choice_1();if(nape==0) break;}}if(idx==2) {while(1) {nape=choice_2();if(nape==0) break;}}if(idx==3) {while(1) {nape=choice_3();if(nape==0) break;}}if(idx==4) {choice_4();}if(idx==5) {choice_5();}miue();}return 0; }

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總結

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