Submission #367301

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Source Code Expand

#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
using namespace std;

typedef long long ll;

int main() {

    int N;
    cin >> N;
    map<int, vector<int>> times;   // time, states(1:start, 2:end)
    
    for (int i = 0; i < N; ++i)
    {
        int s, e;
        scanf("%04d-%04d", &s, &e);
        
        s = s / 5 * 5;
        e = (e + 4)/ 5 * 5;
        
        times[s].push_back(1);
        times[e].push_back(2);
    }
    
    
    int startTime = 0;
    int startCount = 0;
    for (auto const& t : times)
    {
        int lastStartCount = startCount;
        
        for (int v : t.second)
        {
            if (v == 1)
            {
                ++startCount;
            }
            else if (v == 2)
            {
                --startCount;
            }
        }
        
        if (lastStartCount == 0 && startCount > 0)
        {
            startTime = t.first;
        }
        else if (lastStartCount > 0 && startCount == 0)
        {
            printf("%04d-%04d\n", startTime, t.first);
            startTime = 0;
        }
    }
    
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:32:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%04d-%04d", &s, &e);
                                   ^

Judge Result