Submission #466120

#	Time	Username	Problem	Language	Result	Execution time	Memory
466120		SirCovidThe19th	Ili (COI17_ili)	C++17	100 / 100	616 ms	1352 KiB

ili

#include <bits/stdc++.h>
using namespace std; 
 
int n, m; vector<char> A; vector<int> in[20005];
 
void set0(vector<char> &X, int i){
    X[i] = '0'; 
    for (auto nxt : in[i]) if (X[nxt] != '0') set0(X, nxt);
}
 
int main(){
    cin >> n >> m; A.resize(n + m);
    for (int i = 0; i < n + m; i++){
        if (i < n) A[i] = '?';
        else cin >> A[i];
    }
    for (int i = n, u, v; i < n + m; i++){
        string a, b; cin >> a >> b;
        u = stoi(a.substr(1)) + (a[0] == 'c' ? n : 0);
        v = stoi(b.substr(1)) + (b[0] == 'c' ? n : 0);
        in[i].push_back(u - 1); in[i].push_back(v - 1);
    }
    for (int i = n; i < n + m; i++) if (A[i] == '0') set0(A, i);
    for (int i = n; i < n + m; i++) if (A[in[i][0]] == '0' and A[in[i][1]] == '0') A[i] = '0';
    
    for (int i = n; i < n + m; i++){
        if (A[i] == '?'){
            bool ok0 = 1; vector<char> tmp = A; set0(tmp, i);
            for (int j = n; j < n + m and ok0; j++){
                char &in1 = tmp[in[j][0]], &in2 = tmp[in[j][1]], &cur = tmp[j];
                if (in1 == '0' and in2 == '0') cur = '0';
                else if (in1 == '1' or in2 == '1') cur = '1';
                if (j == i and cur == '1') ok0 = 0;
                if (A[j] != '?' and cur != A[j]) ok0 = 0;
            }
            cout<<(ok0 ? "?" : "1");
        }
        else cout<<A[i];
    }
}

• Subtask 1: 7 / 7
• Subtask 2: 42 / 42
• Subtask 3: 51 / 51