题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
#include <iostream>
#include <sstream>
#include <unordered_map>
#include <map>
using namespace std;
int main() {
map<int, int> res;
int num;
cin>>num;
int index;
int val;
string s;
for(int i = 0;i<num+1;i++){
getline(cin,s);
istringstream ss(s);
ss>>index;
ss>>val;
if(s.size()==0){
continue;
}
if(res.find(index)==res.end()){
res.insert({index,val});
}else{
res[index] += val;
}
}
for(auto x:res){
cout<<x.first<<' '<<x.second<<endl;
}
}
// 64 位输出请用 printf("%lld")
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