全是WA，求助大佬

Haidde @ 2024-02-05 20:58:42

#include<stdio.h>
int main()
{
    int l,m,i,a[10010]={0},j,p;
    int u[100]={0},v[100]={0};
    scanf("%d %d",&l,&m);
    for(i=0;i<m;i++)
     {
        scanf("%d %d\n",&u[i],&v[i]);
        for(j=u[i];j<=v[i];j++)
          a[j]=1;

     }
    for(i=0;i<l;i++)
     if(a[i]==0)
       p++;
    printf("%d",p);
    return 0;

}

by _th_tw_on_ @ 2024-02-05 21:11:08

p没初始化,最后一个for循环的条件改成 i<=l

by cyx012113 @ 2024-02-06 10:18:39

@Haidde

我把我的C++代码改成了C的

#include <stdio.h>

int main() {
    int a[2], b[10001], l, m, cnt=0;
    scanf("%d%d", &l, &m);
    for (int i = 0;i <= l;i++) b[i] = 0;
    for (int i = 1;i <= m;i++) {
        for (int j = 0;j < 2;j++) scanf("%d", &a[j]);
        for (int j = 0;j <= l;j++)
            if (j >= a[0] && j <= a[1])
                b[j] = 1;
    }
    for (int i = 0;i <= l;i++)
        if (b[i] == 0) cnt++;
    printf("%d\n", cnt);
    return 0;
}

祝你 AK IOI

by Haidde @ 2024-02-06 10:40:32

@pgl0321 好的，谢谢大佬