Submission #849050

#	Time	Username	Problem	Language	Result	Execution time	Memory
849050		grossly_overconfident	Prisoner Challenge (IOI22_prison)	C++17	30 / 100	22 ms	2136 KiB

prison

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

int solve(int a){
    return to_string(a).size();
}

int find_digit(int a, int i){
    return (to_string(a)[i] - 48);
}

vector<vector<int>> devise_strategy(int n){
    int x = 50;
    vector<vector<int>> out(x, vector<int>(n + 1, 0));

    for (int i = 1; i <= n; ++i){
        out[0][i] = solve(i);
    }
    for (int i = 1; i <= 4; ++i){
        out[i][0] = 1;
        for (int j = 1; j <= n; ++j){
            if (solve(j) > i){
                out[i][j] = -1;
                continue;
            }
            if (solve(j) < i){
                out[i][j] = -2;
                continue;
            }
            out[i][j] = 10 + find_digit(j, 0);
        }
    }
    for (int i = 10; i <= 19; ++i){
        out[i][0] = 0;
        for (int j = 1; j <= n; ++j){
            int k = find_digit(j, 0);
            if (k > i - 10){
                out[i][j] = -2;
                continue;
            }
            if (k < i - 10){
                out[i][j] = -1;
                continue;
            }
            out[i][j] = 20 + find_digit(j, 1);
        }
    }
    for (int i = 20; i <= 29; ++i){
        out[i][0] = 1;
        for (int j = 1; j <= n; ++j){
            int k = find_digit(j, 1);
            if (k > i - 20){
                out[i][j] = -1;
                continue;
            }
            if (k < i - 20){
                out[i][j] = -2;
                continue;
            }
            out[i][j] = 30 + find_digit(j, 2);
        }
    }
    for (int i = 30; i <= 39; ++i){
        out[i][0] = 0;
        for (int j = 1; j <= n; ++j){
            int k = find_digit(j, 2);
            if (k > i - 30){
                out[i][j] = -2;
                continue;
            }
            if (k < i - 30){
                out[i][j] = -1;
                continue;
            }
            out[i][j] = 40 + find_digit(j, 3);
        }
    }
    for (int i = 40; i <= 49; ++i){
        out[i][0] = 1;
        for (int j = 1; j <= n; ++j){
            int k = find_digit(j, 3);
            if (k > i - 40){
                out[i][j] = -1;
                continue;
            }
            if (k < i - 40){
                out[i][j] = -2;
            }
        }
    }
    for (int i = 0; i < x; ++i){
        for (int j = 0; j < n + 1; ++j){
            if (out[i][j] < -2){
                out[i][j] = 0;
            }
        }
    }




    return out;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 20 / 90