STL uva 11991
2015-05-27 11:01
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题意。。。
某个数第n次出现的位置。。。
某个数第n次出现的位置。。。
#include<iostream> #include<cstdio> #include<cstring> #include<cmath> #include<cstdlib> #include<algorithm> #include<queue> #include<string> #include<vector> #include<map> using namespace std; int n,m; map<int,vector<int> > mp; int main() { while(scanf("%d%d",&n,&m)!=EOF) { for(int i=1;i<=n;i++) { int x; scanf("%d",&x); mp[x].push_back(i); } for(int i=1;i<=m;i++) { int x,y; scanf("%d%d",&x,&y); if(mp[y].size()<x) printf("0\n"); else printf("%d\n",mp[y][x-1]); } } return 0; }
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