Submission #960026

#	Time	Username	Problem	Language	Result	Execution time	Memory
960026		Ariadna	Topovi (COCI15_topovi)	C++14	120 / 120	1203 ms	39944 KiB

topovi

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

using namespace std;

map<int, int> xor_rows, xor_columns;
map<int, int> cnt_rows, cnt_columns;
map<pair<int, int>, int> rooks;

void change(int r, int c, ll& total, int n) {
    total -= n-cnt_columns[xor_rows[r]];
    total -= n-cnt_rows[xor_columns[c]];
    if (xor_rows[r] ^ xor_columns[c]) ++total;

    cnt_rows[xor_rows[r]]--;
    xor_rows[r] ^= rooks[{r, c}];
    cnt_rows[xor_rows[r]]++;

    cnt_columns[xor_columns[c]]--;
    xor_columns[c] ^= rooks[{r, c}];
    cnt_columns[xor_columns[c]]++;

    total += n-cnt_columns[xor_rows[r]];
    total += n-cnt_rows[xor_columns[c]];
    if (xor_rows[r] ^ xor_columns[c]) --total;
}

int main() {
    int n, k, p;
    cin >> n >> k >> p;
    cnt_rows[0] = cnt_columns[0] = n;

    ll total = 0;
    while (k--) {
        int r, c, x;
        cin >> r >> c >> x;
        rooks[{r, c}] = x;
        change(r, c, total, n);
    }

    while (p--) {
        int r1, c1, r2, c2;
        cin >> r1 >> c1 >> r2 >> c2;

        change(r1, c1, total, n);
        rooks[{r2, c2}] = rooks[{r1, c1}];
        change(r2, c2, total, n);
        rooks[{r1, c1}] = 0;

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

    return 0;
}

• Subtask 1: 120 / 120