Submission #742584

#	Time	Username	Problem	Language	Result	Execution time	Memory
742584		Cookie	Dreaming (IOI13_dreaming)	C++14	0 / 100	46 ms	15216 KiB

dreaming

#include<bits/stdc++.h>
#include<fstream>
using namespace std;
ifstream fin("VNOICUP.INP");
ofstream fout("VNOICUP.OUT");
#define sz(a) (int)a.size()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
#include <stdio.h>
#include <stdlib.h>
#include "dreaming.h"
const int mxn = 1e5 + 5;
vt<pii>adj[mxn + 1];
ll dp[mxn + 1], dp2[mxn + 1];
bool vis[mxn + 1];
vt<int>comp;
void dfs(int s, int pre){
    comp.pb(s);
    vis[s] = 1; dp[s] = 0;
    bool leaf = 1;
    for(auto [i, w]: adj[s]){
        if(i != pre){
            dfs(i, s);
            dp[s] = max(dp[s], dp[i] + w);
            leaf = 0;
        }
    }
    
}
void dfs2(int s, int pre){
    ll p = dp2[s];
    for(auto [i, w]: adj[s]){
        if(i != pre){
            dp2[i] = max(dp2[i], p + w);
            p = max(p, dp[i] + w);
        }
    }
    reverse(adj[s].begin(), adj[s].end());
    p = dp2[s];
    for(auto [i, w]: adj[s]){
        if(i != pre){
            dp2[i] = max(dp2[i], p + w);
            p = max(p, dp[i] + w);
        }
    }
    for(auto [i, w]: adj[s]){
        if(i != pre){
            dfs2(i, s);
        }
    }
}
int travelTime(int n, int m, int L, int A[], int B[], int T[]) {
    forr(i, 0, m){
        int u = A[i], v = B[i], w = T[i];
        adj[u].pb({v, w}); adj[v].pb({u, w});
    }
    ll ans = 0;
    forr(i, 1, n + 1){
        if(!vis[i]){
            comp.clear();
            dfs(i, -1);
            dfs2(i, -1);
            ll res = 1e18;
            for(auto j: comp){
                res = min(res, max(dp[j], dp2[j]));
            }
            ans += res;
        }
    }
    ans += L;
    return(ans);
}
/*
#define fail(s, x...) do { \
		fprintf(stderr, s "\n", ## x); \
		exit(1); \
	} while(0)

#define MAX_N 100000

static int A[MAX_N];
static int B[MAX_N];
static int T[MAX_N];

int main() {
	int N, M, L, i;
	int res;
    /*
	FILE *f = fopen("dreaming.in", "r");
	if (!f)
		fail("Failed to open input file.");
    
	res = scanf("%d%d%d", &N, &M, &L);
	for (i = 0; i < M; i++)
		res = scanf("%d%d%d", &A[i], &B[i], &T[i]);
	

	int answer = travelTime(N, M, L, A, B, T);
	printf("%d\n", answer);

	return 0;
}
*/

Compilation message (stderr)

dreaming.cpp:97:5: warning: "/*" within comment [-Wcomment]
   97 |     /*
      |      
dreaming.cpp: In function 'void dfs(int, int)':
dreaming.cpp:30:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   30 |     for(auto [i, w]: adj[s]){
      |              ^
dreaming.cpp:29:10: warning: variable 'leaf' set but not used [-Wunused-but-set-variable]
   29 |     bool leaf = 1;
      |          ^~~~
dreaming.cpp: In function 'void dfs2(int, int)':
dreaming.cpp:41:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   41 |     for(auto [i, w]: adj[s]){
      |              ^
dreaming.cpp:49:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   49 |     for(auto [i, w]: adj[s]){
      |              ^
dreaming.cpp:55:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   55 |     for(auto [i, w]: adj[s]){
      |              ^

• Subtask 1: 0 / 14
• Subtask 2: 0 / 10
• Subtask 3: 0 / 23
• Subtask 4: 0 / 18
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23