제출 #956914

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
956914		Ariadna	Topovi (COCI15_topovi)	C++14	30 / 120	386 ms	65536 KiB

topovi

#include <bits/stdc++.h>
#define ll long long

using namespace std;

const int MAX_ROOKS = 2e5;

int main() {
    int n, k, p;
    cin >> n >> k >> p;
    map<int, int> rows, columns;
    map<pair<int, int>, int> rooks;
    while (k--) {
        int r, c, x;
        cin >> r >> c >> x;
        --r; --c;
        rows[r] ^= x;
        columns[c] ^= x;
        rooks[{r, c}] = x;
    }
    ll total = 0;
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            if (((rows[i] ^ rooks[{i, j}]) ^ (columns[j] ^ rooks[{i, j}])) > 0) ++total;
        }
    }
    while (p--) {
        int r1, c1, r2, c2;
        cin >> r1 >> c1 >> r2 >> c2; 
        --r1; --r2; --c1; --c2;
        for (int i = 0; i < n; ++i) {
            if (i == c1) continue;
            if ((columns[i] ^ rows[r1]) == rooks[{r1, c1}]) --total;
            else if ((columns[i] ^ rows[r1]) == 0) ++total;
        }
        for (int i = 0; i < n; ++i) {
            if (i == r1) continue;
            if ((columns[c1] ^ rows[i]) == rooks[{r1, c1}]) --total;
            else if ((columns[c1] ^ rows[i]) == 0) ++total;
        }
        rows[r1] ^= rooks[{r1, c1}];
        columns[c1] ^= rooks[{r1, c1}];
        rooks[{r2, c2}] = rooks[{r1, c1}];
        rooks[{r1, c1}] = 0;
        for (int i = 0; i < n; ++i) {
            if (i == c2) continue;
            if ((columns[i] ^ rows[r2]) == rooks[{r2, c2}]) --total;
            else if ((columns[i] ^ rows[r2]) == 0) ++total;
        }
        for (int i = 0; i < n; ++i) {
            if (i == r2) continue;
            if ((columns[c2] ^ rows[i]) == rooks[{r2, c2}]) --total;
            else if ((columns[c2] ^ rows[i]) == 0) ++total;
        }
        rows[r2] ^= rooks[{r2, c2}];
        columns[c2] ^= rooks[{r2, c2}];

        cout << total << '\n';
    }

    return 0;
}

• Subtask 1: 30 / 120