Submission #678058

#	Time	Username	Problem	Language	Result	Execution time	Memory
678058		Cross_Ratio	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	36 / 100	260 ms	33148 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
const int INF = 1e9;
int B[30005];
int P[30005];
int dis[2005][2005];
int dis2[2005];
bool vis[2005];
signed main() {
    cin.sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int N, M;
    cin >> N >> M;
    int i, j;
    for(i=0;i<M;i++) cin >> B[i] >> P[i];
    for(i=0;i<M;i++) {
        for(j=0;j<M;j++) {
            int d = abs(B[i] - B[j]);
            if(d % P[i] != 0) dis[i][j] = INF;
            else {
                dis[i][j] = d / P[i];
            }
        }
    }
    for(i=0;i<M;i++) dis2[i] = INF;
    dis2[0] = 0;
    while(true) {
        int mi = INF, pt = -1;
        for(i=0;i<M;i++) {
            if(!vis[i] && dis2[i] < mi) {
                mi = dis2[i];
                pt = i;
            }
        }
        if(pt==-1) break;
        for(i=0;i<M;i++) {
            dis2[i] = min(dis2[i], dis2[pt] + dis[pt][i]);
        }
        vis[pt] = true;
    }
    cout << (dis2[1]==INF?-1:dis2[1]);
}

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 14 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43