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798. 差分矩阵
https://www.acwing.com/problem/content/submission/code_detail/9152970/
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AcWing/798/798.cpp
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36
AcWing/798/798.cpp
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#include <bits/stdc++.h>
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using std::cin;
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using std::cout;
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using std::endl;
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int n, m, q, c, b[1005][1005];
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int main() {
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cin >> n >> m >> q;
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for (int i = 1; i <= n; i++) {
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for (int j = 1; j <= m; j++) {
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cin >> c;
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b[i][j] += c;
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b[i + 1][j] -= c;
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b[i][j + 1] -= c;
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b[i + 1][j + 1] += c;
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}
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}
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while (q--) {
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int x1, y1, x2, y2;
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cin >> x1 >> y1 >> x2 >> y2 >> c;
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b[x1][y1] += c;
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b[x2 + 1][y1] -= c;
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b[x1][y2 + 1] -= c;
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b[x2 + 1][y2 + 1] += c;
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}
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for (int i = 1; i <= n; i++) {
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for (int j = 1; j <= m; j++) {
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b[i][j] += b[i - 1][j] + b[i][j - 1] - b[i - 1][j - 1];
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cout << b[i][j] << ' ';
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}
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cout << endl;
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}
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return 0;
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}
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