Submission #202676

#	Time	Username	Problem	Language	Result	Execution time	Memory
202676		karma	Genetics (BOI18_genetics)	C++14	0 / 100	6 ms	888 KiB

genetics

#include<bits/stdc++.h>
#define ll            long long
#define pb            emplace_back
#define fi            first
#define se            second
#define mp            make_pair
//#define int           int64_t

using namespace std;

typedef pair<ll, ll> pii;
const int N = 4500;

ll k, cur = 0, ss;
int n, m;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int Code(char c) {
    if(c == 'A') return 1;
    if(c == 'C') return 2;
    if(c == 'T') return 3;
    return 0;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    #define FileName      "test"
    if(fopen(FileName".inp", "r")) {
       freopen(FileName".inp", "r", stdin);
       freopen(FileName".out", "w", stdout);
    }
    cin >> n >> m >> k;
    vector<string> s(n);
    vector<vector<ll>> sum(n, vector<ll>(4));
    vector<ll> ssum(n), p(n);
    for(int i = 0; i < n; ++i) {
        p[i] = uniform_int_distribution<ll>((ll)1e9, (ll)1e11)(rng);
        cin >> s[i];
        for(int j = 0; j < m; ++j) sum[j][Code(s[i][j])] += p[i];
        cur += p[i] * k;
    }
    for(int i = 0; i < m; ++i) {
        ssum[i] = 0;
        for(int j = 0; j < 4; ++j) ssum[i] += sum[i][j];
    }
    for(int i = 0; i < n; ++i) {
        ss = 0;
        for(int j = 0; j < m; ++j) ss += (ssum[j] - sum[j][Code(s[i][j])]);
        if(cur - p[i] * k == ss) return cout << i + 1, 0;
    }
}

Compilation message (stderr)

genetics.cpp: In function 'int main()':
genetics.cpp:30:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
        freopen(FileName".inp", "r", stdin);
        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
genetics.cpp:31:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
        freopen(FileName".out", "w", stdout);
        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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