Submission #562576

#	Time	Username	Problem	Language	Result	Execution time	Memory
562576		Leo121	Ideal city (IOI12_city)	C++14	11 / 100	1098 ms	1748 KiB

city

#include <bits/stdc++.h>
#define forn(i, a, b) for(int i = int (a); i <= int(b); ++ i)
#define fora(i, a, b) for(int i = int (a); i >= int(b); -- i)
#define pb push_back
#define fi first
#define se second
#define mp make_pair
using namespace std;
typedef pair<int, int> pii;
typedef long long ll;
int mx[4] = {0, 0, 1, -1};
int my[4] = {1, -1, 0, 0};
map<pii, pii> mapa;
queue<pii> q;
int mod = 1e9;
int res = 0;
void bfs(int ind){
    pii act;
    while(!q.empty()){
        act = q.front();
        q.pop();
        forn(i, 0, 3){
            if(mapa.count(mp(act.fi + mx[i], act.se + my[i]))){
                if(mapa[mp(act.fi + mx[i], act.se + my[i])].fi == -1){
                    mapa[mp(act.fi + mx[i], act.se + my[i])].fi = mapa[mp(act.fi, act.se)].fi + 1;
                    if(mapa[mp(act.fi + mx[i], act.se + my[i])].se > ind){
                        res += mapa[mp(act.fi + mx[i], act.se + my[i])].fi;
                        res %= mod;
                    }
                    q.push(mp(act.fi + mx[i], act.se + my[i]));
                }
            }
        }
    }
}

int DistanceSum(int N, int *X, int *Y) {
    forn(i, 0, N - 1){
        mapa[mp(X[i], Y[i])] = mp(0, i);
        forn(j, 0, N - 1){
            if(j != i){
                mapa[mp(X[j], Y[j])] = mp(-1, j);
            }
        }
        q.push(mp(X[i], Y[i]));
        bfs(i);
    }
    return res;
}

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