hznu-1892-forever 17 years old

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#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 10;
int main() {
    
    
	int T; scanf("%d", &T);
	while (T--) {
    
    
		int n; scanf("%d", &n);
		if (n < 15) puts("-1");
		else printf("%d\n", n - 7);
	}
	return 0;
}

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Origin blog.csdn.net/bloom_er/article/details/106993205