Submission #202914

#	Time	Username	Problem	Language	Result	Execution time	Memory
202914		renebaebae	Genetics (BOI18_genetics)	C++14	100 / 100	283 ms	17144 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 = (int)4111;

ll p[N], k, sum[N][5], cur = 0, ss, ssum[N];
int n, m;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
char s[N][N];

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);
    }
    scanf("%d%d%d", &n, &m, &k);
    for(int i = 1; i <= n; ++i) {
        scanf("%s", s[i]);
        for(int j = 0; j < m; ++j) s[i][j] = Code(s[i][j]);
    }
    int step = 10;
    while(step --) {
        for(int i = 1; i <= n; ++i) {
            p[i] = uniform_int_distribution<ll>((ll)1e10, (ll)1e11)(rng);
            for(int j = 0; j < m; ++j) sum[j][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 = 1; i <= n; ++i) {
            ss = 0;
            for(int j = 0; j < m; ++j) ss += (ssum[j] - sum[j][s[i][j]]);
            if(cur - p[i] * k == ss) return printf("%d\n", i), 0;
        }
        if(step == 0) return printf("%d\n", n), 0;
    }
}

Compilation message (stderr)

genetics.cpp: In function 'int main()':
genetics.cpp:34:31: warning: format '%d' expects argument of type 'int*', but argument 4 has type 'long long int*' [-Wformat=]
     scanf("%d%d%d", &n, &m, &k);
                             ~~^
genetics.cpp:43:54: warning: array subscript has type 'char' [-Wchar-subscripts]
             for(int j = 0; j < m; ++j) sum[j][s[i][j]] += p[i];
                                                      ^
genetics.cpp:52:71: warning: array subscript has type 'char' [-Wchar-subscripts]
             for(int j = 0; j < m; ++j) ss += (ssum[j] - sum[j][s[i][j]]);
                                                                       ^
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".inp", "r", stdin);
        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
genetics.cpp:32:15: 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);
        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
genetics.cpp:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d", &n, &m, &k);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~
genetics.cpp:36:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s", s[i]);
         ~~~~~^~~~~~~~~~~~

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