题解 | 合并表记录

#include <iostream>
using namespace std;

int shu[11111111]={0};
int main() {
    int num;
    cin>>num;
    int a,b;
    for(int i = 0;i <num;i++){
        cin>>a>>b;
        if(shu[a]==0){
            shu[a] = b;
        }
        else{
            shu[a] += b;
        }
    }
    for (int k =0; k <= 11111111;k++) {
        if(shu[k]==0){
            continue;
        }
        cout<<k<<" "<<shu[k]<<endl;
    }
}
// 64 位输出请用 printf("%lld")