Submission #55556

#	Time	Username	Problem	Language	Result	Execution time	Memory
55556		red1108	줄서기 (KOI17_line)	C++17	100 / 100	244 ms	105856 KiB

line

#include <stdio.h>
int check[100010],help[100010];
int main()
{
    int n, m;
    int i, a, b;
    scanf("%d %d", &n, &m);
    for(i=1;i<=n;i++)
    {
        check[i]=i;
    }
    for(i=1;i<=m;i++)
    {
        scanf("%d %d", &a, &b);
        check[a]++;
        check[b]--;
    }
    for(i=1;i<=n;i++)
    {
        if(check[i]<1||check[i]>n||help[check[i]])
        {
            printf("-1");
            return 0;
        }
        help[check[i]]=1;
    }
    for(i=1;i<=n;i++)
    {
        printf("%d ", check[i]);
    }
}

Compilation message (stderr)

line.cpp: In function 'int main()':
line.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
line.cpp:14:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 21 / 21
• Subtask 3: 30 / 30
• Subtask 4: 42 / 42