oj.uz

답안 #382848

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
382848 2021-03-28T10:22:34 Z ne4eHbKa Magenta (COCI21_magenta) C++17
30 / 110
 74 ms 10560 KB 
#include <bits/stdc++.h>
using namespace std;
#ifndef _LOCAL
//#pragma GCC optimize("O3,Ofast")
#else
#pragma GCC optimize("O0")
#endif
template<typename t> inline void umin(t &a, const t b) {a = min(a, b);}
template<typename t> inline void umax(t &a, const t b) {a = max(a, b);}
typedef pair<int, int> pii;
typedef long long ll;
typedef long double ld;
typedef int8_t byte;
ll time() {return chrono::system_clock().now().time_since_epoch().count();}
mt19937 rnd(time());
#define ft first
#define sd second
#define len(f) int((f).size())
#define bnd(f) (f).begin(), (f).end()
#define _ <<' '<<
const int inf = 1e9 + 5;
const ll inf64 = 4e18 + 5;
const int md = 998244353;
namespace MD {
    void add(int &a, const int b) {if((a += b) >= md) a -= md;}
    void sub(int &a, const int b) {if((a -= b) < 0) a += md;}
    int prod(const int a, const int b) {return ll(a) * b % md;}
};

const int N = 1e5 + 5;
int n, a, b, da[N], db[N];
bool f[N];

vector<pii> g[N];

struct edge {
    int u, v, c;
    edge() {
        string f;
        cin >> u >> v >> f;
        --u, --v;
        c = 0;
        if(f[0] != 'c') c |= 1;
        if(f[0] != 'p') c |= 2;
        g[u].push_back({v, c});
        g[v].push_back({u, c});
    }
};

vector<edge> es;

void dijkstra(int *d, int s, int ms, int t) {
    memset(d, 127, n << 2);
    d[s] = 0;
    queue<int> q;
    q.push(s);
    while(!q.empty()) {
        int v = q.front();
        q.pop();
        if(v == t) continue;
        for(auto &i : g[v]) {
            if(i.sd & ms) {
                int u = i.ft;
                if(d[u] <= d[v] + 1) continue;
                d[u] = d[v] + 1;
                q.push(u);
            }
        }
    }
}

void solve() {
    #define ra return void(cout << "Paula\n")
    #define rb return void(cout << "Marin\n")
    #define rab return void(cout << "Magenta\n")
    cin >> n >> a >> b;
    --a, --b;
    for(int i = 0; i < n; ++i)
        g[i].clear();
    es.clear();
    for(int i = 1; i < n; ++i)
        es.emplace_back();
    dijkstra(da, a, 1, b);
    dijkstra(db, b, 2, a);
    if(da[b] & 1) {
        for(int i = 0; i < n; ++i)
            f[i] = da[i] <= db[i];
        for(auto &e : es)
            if(f[e.v] && f[e.u] && e.c == 1)
                rab;
        rb;
    } else {
        for(int i = 0; i < n; ++i)
            f[i] = db[i] < da[i];
        for(auto &e : es)
            if(f[e.v] && f[e.u] && e.c == 2)
                rab;
        ra;
    }
}

signed main() {
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#ifndef _LOCAL
//    freopen("file.in", "r", stdin);
//    freopen("file.out", "w", stdout);
#else
    system("color a");
    freopen("in.txt", "r", stdin);
    int t; cin >> t;
    while(t--)
#endif
    solve();
}

Subtask #1
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 2668 KB Output is correct
2 Incorrect 2 ms 2668 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 72 ms 10400 KB Output is correct
2 Correct 67 ms 10560 KB Output is correct
3 Correct 73 ms 10400 KB Output is correct
4 Correct 74 ms 10536 KB Output is correct
5 Correct 73 ms 10400 KB Output is correct
6 Correct 3 ms 2668 KB Output is correct
7 Correct 3 ms 2668 KB Output is correct
8 Correct 3 ms 2668 KB Output is correct

Subtask #3
0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 2668 KB Output is correct
2 Incorrect 2 ms 2668 KB Output isn't correct
3 Halted 0 ms 0 KB -