C - Winner

CodeForces-2A

The winner of the card game popular in Berland "Berlogging" is determined according to the following rules. If at the end of the game there is only one player with the maximum number of points, he is the winner. The situation becomes more difficult if the number of such players is more than one. During each round a player gains or loses a particular number of points. In the course of the game the number of points is registered in the line "name score", where name is a player's name, and score is the number of points gained in this round, which is an integer number. If score is negative, this means that the player has lost in the round. So, if two or more players have the maximum number of points (say, it equals to m) at the end of the game, than wins the one of them who scored at least m points first. Initially each player has 0 points. It's guaranteed that at the end of the game at least one player has a positive number of points.

Input
The first line contains an integer number n (1??≤??n??≤??1000), n is the number of rounds played. Then follow n lines, containing the information about the rounds in "name score" format in chronological order, where name is a string of lower-case Latin letters with the length from 1 to 32, and score is an integer number between -1000 and 1000, inclusive.

Output
Print the name of the winner.

Example
Input
3
mike 3
andrew 5
mike 2
Output
andrew
Input
3
andrew 3
andrew 2
mike 5
Output
andrew

題意：算參賽選手的總分，分最高的獲勝，如果不止一個人最高分，那么誰最先達到此分數，誰獲勝。

解法：用map存，分兩次比較，第一次找出最高分，第二次找到最先達到最高分的選手。

代碼：

#include<iostream>
#include<map>
#include<string>
using namespace std;
int score[1005];
string name[1005];
int main()
{
    int n,maxn=0;
    cin>>n;
    map<string,int> a;
    map<string,int> b;
    string ans;
    for(int i=0;i<n;i++){
        cin>>name[i];
        cin>>score[i];
        a[name[i]]+=score[i];
    }
    for(int i=0;i<n;i++)
        if(maxn<a[name[i]])
            maxn=a[name[i]];
    for(int i=0;i<n;i++){
        if(a[name[i]]==maxn){
            b[name[i]]+=score[i];
            if(b[name[i]]>=maxn){
                ans=name[i];
                break;
            }
        }
    }
    cout<<ans<<endl;
    return 0;
}