28 lines
696 B
C++
28 lines
696 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int n, m;
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const int N = 1000010;
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int r[N];
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int main() {
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cin >> n >> m;
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// 每一天可租借教室数
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for (int i = 1; i <= n; i++) cin >> r[i];
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// 从哪天到哪天，借多少个
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for (int i = 1; i <= m; i++) {
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int d, s, t;
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cin >> d >> s >> t;
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// 从开始天到结束天
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for (int j = s; j <= t; j++) {
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r[j] -= d; // 减去借走的教室数
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if (r[j] < 0) { // 小于0了！
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cout << -1 << endl
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<< i << endl;
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return 0;
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}
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}
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}
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cout << 0 << endl;
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return 0;
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} |