I got WA#1. But my program gives correct result for all tests what i found on this forum.
Why WA#1?
Please give tests where my program will give incorrect result.
My source code:
////////////////////////////
///Stupid brute force
#include <iostream>
#include <cstdio>
using namespace std;

int mem[30000];
//set<int> fb;

int main()
{
    char a[100];
    char c;
    int ltd=0;
    int i;
    for(i=0;i<30000;i++)mem[i]=0;
    while(!cin.eof())
    {
        cin.getline(a,100);
        int t,mp;
        sscanf(a,"%d %c%d",&t,&c,&mp);
        mp--;
        int mfb=40000;
        for(i=0;i<30000;i++)
        {
            mem[i]-=t-ltd;
            if((mem[i]<1)&&(i<mfb)){mfb=i;if(t==ltd)break;}
        }
        if(c=='+')
        {
            mem[mfb]=600;
            cout<<mfb+1<<'\n';
        }
        else
        {
            if(mem[mp]>0){mem[mp]=600;cout<<"+\n";}
            else cout<<"-\n";
        }
        ltd=t;
    }
    return 0;
}