大致题意就是给出N行M列的元素,找出出现次数最多的元素并输出。

#include<iostream>
#include<unordered_map>
using namespace std; int main() {
unordered_map<int,int> mp;
int m,n;
cin>>m>>n;
for(int i = ; i < n; ++i) {
for(int j = ; j < m; ++j) {
int t;
scanf("%d",&t); //可能会超时,把cin改为scanf
mp[t]++;
}
}
int max = -,ans = ;
for(auto it = mp.begin(); it != mp.end(); ++it) {
if(max < it->second) {
max = it->second;
ans = it->first;
} }
cout<<ans;
return ;
}

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