Submission #31449270

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Source Code Expand

#include<stdio.h>

int sum[200010], l, r, n, m, ans;
int main() {
	scanf("%d%d", &n, &m);
	for(int i = 1; i <= m; ++i) {
		scanf("%d%d", &l, &r);
		sum[l]++, sum[r + 1]--;
	}
	for(int i = 1; i <= n; ++i) sum[i] += sum[i - 1];
	for(int i = 1; i <= n; ++i) ans += (sum[i] == m);
	printf("%d\n", ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:5:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    5 |  scanf("%d%d", &n, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~
./Main.cpp:7:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    7 |   scanf("%d%d", &l, &r);
      |   ~~~~~^~~~~~~~~~~~~~~~

Judge Result