Submission #1155111

#	Time	Username	Problem	Language	Result	Execution time	Memory
1155111		andrewp	Traffic (IOI10_traffic)	C++20	50 / 100	181 ms	43348 KiB

traffic

#include <bits/stdc++.h>  
#include "traffic.h"
using namespace std;
#define ll long long
#define pb push_back
#define pii pair<int,int>
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(a) ((int)a.size())     
const int N=1e6+10;  

ll n, ps[N], ss[N];
ll pss[N], sss[N]; 

int LocateCentre(int N_,int P[],int S[],int D[]) {
    n=N_;
    bool p50=true;
    for (int i=0; i<n; i++) 
        p50&=(S[i]==i&&D[i]==i+1);
    if (p50) { 
        for (int i=1; i<=n; i++) {
            ps[i]=ps[i-1]+P[i-1];
            pss[i]=pss[i-1]+ps[i];  
        }
        for (int i=n; i>=1; i--) { 
            ss[i]=ss[i+1]+P[i-1]; 
            sss[i]=sss[i+1]+ss[i];  
        }
        ll ans=(ll)(1e18);
        int ret=0;
        for (int i=1; i<=n; i++) {
            if (ans>pss[i-1]+sss[i+1]) {
                ans=pss[i-1]+sss[i+1];
                ret=i;
            }   
        }
        return (ret-1);
    } 

}

// int main () {    
//     ios::sync_with_stdio(false), cin.tie(0); 
            

//     return 0;
// }          

Compilation message (stderr)

traffic.cpp: In function 'int LocateCentre(int, int*, int*, int*)':
traffic.cpp:40:1: warning: control reaches end of non-void function [-Wreturn-type]
   40 | }
      | ^

• Subtask 1: 25 / 25
• Subtask 2: 25 / 25
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25