Submission #593901

#	Time	Username	Problem	Language	Result	Execution time	Memory
593901		AlesL0	Genetics (BOI18_genetics)	C++17	46 / 100	751 ms	2388 KiB

genetics

#pragma GCC optimize("03")

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int comp(string a, string b){
    int r = 0;
    for (int i = 0; i < a.size(); i++)if (a[i] != b[i])r++;
    return r;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n, m, k; cin >> n >> m >> k;
    if (n <= 100 && m <= 100){
        string x[n];
        for (int i = 0; i < n; i++)cin >> x[i];
        for (int i = 0; i < n; i++){
            bool flag10 = 1;
            for (int j = 0; j < n; j++){
                if (i == j)continue;
                if (comp(x[i], x[j]) != k){
                    flag10 = 0;
                    break;
                }
            }
            if (flag10){
                cout << i+1;
                break;
            }
        }
    }
    else {
        bitset <4100> b[n];
        for (int i = 0; i < n; i++){
            for (int j = 0; j < m; j++){
                char c; cin >> c;
                if (c == 'A')b[i].set(j);
            }
        }
        for (int i = 0; i < n; i++){
            bool flag10 = 1;
            int x = min(1000, n);
            for (int j = 0; j < x; j++){
                if (i == j)continue;
                if ((b[i]^b[j]).count() != k){
                    flag10 = 0;
                    break;
                }
            }
            if (flag10){
                x = max(0, n-999);
                for (int j = n-1; j >= x; j--){
                    if (i == j)continue;
                    if ((b[i]^b[j]).count() != k){
                        flag10 = 0;
                        break;
                    }
                }
            }
            if (flag10){
                cout << i+1;
                return 0;
            }
        }
    }
}

Compilation message (stderr)

genetics.cpp: In function 'int comp(std::string, std::string)':
genetics.cpp:11:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for (int i = 0; i < a.size(); i++)if (a[i] != b[i])r++;
      |                     ~~^~~~~~~~~~
genetics.cpp: In function 'int main()':
genetics.cpp:51:41: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   51 |                 if ((b[i]^b[j]).count() != k){
      |                     ~~~~~~~~~~~~~~~~~~~~^~~~
genetics.cpp:60:45: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   60 |                     if ((b[i]^b[j]).count() != k){
      |                         ~~~~~~~~~~~~~~~~~~~~^~~~

• Subtask 1: 27 / 27
• Subtask 2: 19 / 19
• Subtask 3: 0 / 28
• Subtask 4: 0 / 26