제출 #373531

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
373531		lakshith_	Traffic (IOI10_traffic)	C++14	0 / 100	16 ms	23788 KiB

traffic

    #include <bits/stdc++.h>
    #include "traffic.h"
    #define pb push_back
	#define ll int
     
    using namespace std;
	
    vector<vector<int>> adj(1000000,vector<int>());

    map<pair<int,int>,ll> m;

    ll dp(int p,int c,int* P){
        if(m.find((pair<int,int>){p,c})!=m.end())return m[(pair<int,int>){p,c}];
        ll ans = P[c];
        for(int v:adj[c]){
            if(v==p)continue;
            ans += dp(c,v,P);
        }
        m.insert({{p,c},ans});
        return ans;
	}
     
    int LocateCentre(int n,int p[],int s[],int d[]){
      for(int i=0;i<n-1;i++){
        adj.at(s[i]).pb(d[i]);
        adj.at(d[i]).pb(s[i]);
      }
      ll ans = LLONG_MAX;
      int index = -1;
      for(int i=0;i<n;i++){
          ll local = LLONG_MIN;
          for(int v:adj[i])local = max(local,dp(i,v,p));
          if(local<ans){
              ans = local;
              index = i;
          }
      }
      return index;
    }

컴파일 시 표준 에러 (stderr) 메시지

traffic.cpp: In function 'int LocateCentre(int, int*, int*, int*)':
traffic.cpp:28:16: warning: overflow in conversion from 'long long int' to 'int' changes value from '9223372036854775807' to '-1' [-Woverflow]
   28 |       ll ans = LLONG_MAX;
      |                ^~~~~~~~~
traffic.cpp:31:22: warning: overflow in conversion from 'long long int' to 'int' changes value from '-9223372036854775808' to '0' [-Woverflow]
   31 |           ll local = LLONG_MIN;
      |                      ^~~~~~~~~

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