Submission #804022

#	Time	Username	Problem	Language	Result	Execution time	Memory
804022		Dan4Life	Ideal city (IOI12_city)	C++17	23 / 100	27 ms	1152 KiB

city

#include <bits/stdc++.h>
using namespace std;
using  ll = long long;
const ll MOD = (ll)1e9;

int DistanceSum(int N, int *X, int *Y) {
    ll ans = 0, tot = 0; 
    sort(X,X+N), sort(Y,Y+N);
    for(int j : {0,1}){
        tot = 0; sort(X,X+N);
        for(ll i = 0; i < N; i++){
            ans+=(1ll*X[i]*i-tot+MOD)%MOD;
            tot+=X[i], tot%=MOD; ans%=MOD;swap(X[i],Y[i]);
        }
    }
    return (int)ans;
}

Compilation message (stderr)

city.cpp: In function 'int DistanceSum(int, int*, int*)':
city.cpp:9:13: warning: unused variable 'j' [-Wunused-variable]
    9 |     for(int j : {0,1}){
      |             ^

• Subtask 1: 0 / 11
• Subtask 2: 0 / 21
• Subtask 3: 23 / 23
• Subtask 4: 0 / 45