제출 #384867

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
384867		AdiZer0	Deblo (COCI18_deblo)	C++17	45 / 90	1094 ms	8556 KiB

deblo

#include <bits/stdc++.h>

#define pb push_back
#define whole(x) x.begin(), x.end()
#define sz(x) (int)x.size()

using namespace std;

typedef long long ll;
typedef long double ld;

const int N = (int)1e5 + 7;
const int INF = (int)1e9 + 7;
const ll linf = (ll)1e18 + 1;

int c[N], d[N];
vector<int> g[N];

void bfs(int s) { 
    queue<int> q;
    d[s] = c[s];
    q.push(s);
    while (!q.empty()) { 
        int v = q.front();
        q.pop();
        for (int to : g[v]) { 
            if (d[to] == -1) { 
                d[to] = (d[v] ^ c[to]);
                q.push(to);
            }
        }
    }
}

int main() {
    int n; scanf ("%d", &n);
    for (int i = 1; i <= n; ++i) scanf ("%d", c + i);
    for (int i = 1; i < n; ++i) { 
        int u, v; scanf ("%d %d", &u, &v);
        g[u].pb(v), g[v].pb(u);
    }
    ll ans = 0;
    for (int i = 1; i <= n; ++i) { 
        for (int j = 1; j <= n; ++j) d[j] = -1;
        bfs(i);
        for (int j = i; j <= n; ++j) ans += d[j];
    }
    printf ("%lld\n", ans);
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

deblo.cpp: In function 'int main()':
deblo.cpp:36:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   36 |     int n; scanf ("%d", &n);
      |            ~~~~~~^~~~~~~~~~
deblo.cpp:37:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   37 |     for (int i = 1; i <= n; ++i) scanf ("%d", c + i);
      |                                  ~~~~~~^~~~~~~~~~~~~
deblo.cpp:39:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   39 |         int u, v; scanf ("%d %d", &u, &v);
      |                   ~~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 45 / 90