Submission #409053

#	Time	Username	Problem	Language	Result	Execution time	Memory
409053		CheckMate	Painting Walls (APIO20_paint)	C++17	0 / 100	1 ms	204 KiB

paint

#include <bits/stdc++.h>
using namespace std;

const int inf = 1e7;

int minimumInstructions(int n, int m, int K, vector<int> c, vector<int> a, vector< vector<int> > b) {
    vector<bool> can(n);
    for (int i = 0; i < n; i++) {
        can[i] = false;
    }

    vector<int> who(K);
    for (int i = 0; i < K; i++) who[i] = -1;
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < a[i]; j++) {
            who[b[i][j]] = i;
        }
    }

    int plus1 = 0;
    int other = 0;

    for (int i = 0; i < m - 1; i++) {
        if (who[c[i]] == -1 || who[c[i + 1]] == -1) {
            other++;
        } else {
            if ((who[c[i + 1]] - who[c[i]] + m) % m == 1) {
                plus1++;
            } else {
                other++;
            }
        }
    }

    for (int i = 0; i <= n - m; i++) {
        if (other == 0) {
            can[i] = true;
        }

        if (i == n - m) break;

        if (who[c[i]] == -1 || who[c[i + 1]] == -1) {
            other--;
        } else {
            if ((who[c[i + 1]] - who[c[i]] + m) % m == 1) {
                plus1--;
            } else {
                other--;
            }
        }

        if (who[c[i + m]] == -1 || who[c[i + m - 1]] == -1) {
            other++;
        } else {
            if ((who[c[i + m]] - who[c[i + m - 1]] + m) % m == 1) {
                plus1++;
            } else {
                other++;
            }
        }
    }

    int mx_right[n + 1];
    for (int i = 0; i <= n; i++) {
        mx_right[i] = -inf;
    }
    mx_right[0] = 0;

    int now_value = 0;

    bool OK = true;

    for (int i = 0; i < n; i++) {
        if (can[i]) {
            mx_right[now_value + 1] = i + m;
        }

        if (i >= mx_right[now_value]) {
            now_value++;
            if (mx_right[now_value] == -inf) {
                OK = false;
                break;
            }
        }
    }

    if (!OK) {
        return -1;
    } else {
        return now_value;
    }
}

/*
int main() {
    cout << minimumInstructions(10, 3, 7, {1, 2, 0, 4, 1, 3, 1, 2, 4, 5}, {3, 2, 2}, {{0, 4, 6}, {1, 5}, {2, 3}}) << endl;
}
*/

• Subtask 1: 0 / 12
• Subtask 2: 0 / 15
• Subtask 3: 0 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 37