fix: wrong implementation

This commit is contained in:
Eat-Swap 2022-06-05 02:13:49 +08:00
parent 290b6e1d86
commit b222671acd
Signed by: Eatswap
GPG Key ID: BE661106A1F3FA0B
1 changed files with 2 additions and 2 deletions

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@ -30,8 +30,8 @@ public:
}
int sumRegion(int x0, int y0, int x1, int y1) {
x1--;
y1--;
x1++;
y1++;
return prefixSum[x1 * n + y1] - prefixSum[x0 * n + y1] - prefixSum[x1 * n + y0] + prefixSum[x0 * n + y0];
}
};