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题意:大概题意就是每个学生都有自己的序号id,以及C语言场景c,数学成绩m,英语成绩e,以及平均成绩a。题目会输出n个学生的id以及三门主科的成绩,气候跟寻m次询问,问某id的学生最佳成绩排名及科目名称。
思路:思路其实很简单,分四个数组存放每科所有学生的成绩再排个序即可。但需要注意两个坑点:1.在选取学生最高排名时必须按照a,c,m,e的优先级取最高排名科目(即每个成绩都排名第三,但必须输出 3 A)。2. 相同分数排名相同,但下一分数不会递补(即现在有 90、90、89的三个成绩,则气排名分别为1、1、3)。
AC代码:
#include#define int long long #define endl 'n' using namespace std; const int N = 1e5+10; int n, m; struct node{ int c, m, e, a; }; map mp; vector cc, mm, ee, aa; map gc, gm, ge, ga; map vis; bool cmpc(node x, node y){ return x.c>y.c; } bool cmpm(node x, node y){ return x.m>y.m; } bool cmpe(node x, node y){ return x.e>y.e; } bool cmpa(node x, node y){ return x.a>y.a; } signed main() { cin >> n >> m; for(int i = 1; i <= n; i ++){ string s; int x, y, z; cin >> s >> x >> y >> z; vis[s] = 1; node tmp = {x, y, z, (x+y+z)/3}; mp[s] = tmp; cc.push_back(tmp); mm.push_back(tmp); ee.push_back(tmp); aa.push_back(tmp); } sort(cc.begin(), cc.end(), cmpc); sort(mm.begin(), mm.end(), cmpm); sort(ee.begin(), ee.end(), cmpe); sort(aa.begin(), aa.end(), cmpa); for(int i = 0; i < cc.size(); i ++){ if(!gc[cc[i].c]) gc[cc[i].c] = i+1; } for(int i = 0; i < mm.size(); i ++){ if(!gm[mm[i].m]) gm[mm[i].m] = i+1; } for(int i = 0; i < ee.size(); i ++){ if(!ge[ee[i].e]) ge[ee[i].e] = i+1; } for(int i = 0; i < aa.size(); i ++){ if(!ga[aa[i].a]) ga[aa[i].a] = i+1; } while(m--){ string s; cin >> s; if(!vis[s]){ cout << "N/A" << endl; continue; } int pc = gc[mp[s].c], pm = gm[mp[s].m], pe = ge[mp[s].e], pa = ga[mp[s].a]; if(pa<=pc&&pa<=pm&&pa<=pe) cout << pa << " A" << endl; else if(pc<=pm&&pc<=pe&&pc<=pa) cout << pc << " C" << endl; else if(pm<=pc&&pm<=pe&&pm<=pa) cout << pm << " M" << endl; else if(pe<=pc&&pe<=pm&&pe<=pa) cout << pe << " E" << endl; // cout << mp[s].c << " " << mp[s].m << " " << mp[s].e << " " << mp[s].a << endl; // cout << pc << " " << pm << " " << pe << " " << pa << endl << endl; } return 0; }



