Submission #932376

#	Time	Username	Problem	Language	Result	Execution time	Memory
932376		salmon	Shortcut (IOI16_shortcut)	C++14	0 / 100	0 ms	344 KiB

shortcut

#include "shortcut.h"
#include <bits/stdc++.h>
using namespace std;

queue<pair<int,int>> q;
long long int d[1100100];

long long find_shortcut(int N, vector<int> l, vector<int> d, int c){

    long long int small = 1e18;

    for(int i = 0; i < N; i++){
        for(int j = i + 1; j < N; j++){



            for(int k = 0; k < N; k++){
                long long int big = 0;
                for(int i = 0; i < N; i++){
                    d[i] = 1e18;
                }
                q.push({0,k});
                d[k] = 0;
                while(!q.empty()){
                    if(d[q.front().second] == q.front().first){
                        int m = q.front().second;

                        if(m == j){
                            if(d[m] + c < d[i]){
                                d[i] = d[m] + c;
                                q.push({d[i],i});
                            }
                        }
                        else if(m == i){
                            if(d[m] + c < d[j]){
                                d[j] = d[m] + c;
                                q.push({d[j],j});
                            }
                        }

                        if(m != N - 1){
                            if(d[m + 1] > d[m] + l[m]){
                                d[m + 1] = d[m] + l[m];
                                q.push({d[m + 1], m + 1});
                            }
                        }

                        if(m != 0){
                            if(d[m - 1] > d[m] + l[m - 1]){
                                d[m - 1] = d[m - 1] + l[m - 1];
                                q.push({d[m - 1], m - 1});
                            }
                        }
                    }
                    q.pop();
                }


                for(int i = 0; i < N; i++){
                    big = max(big,(long long int)d[i]);
                }
                small = min(small,big);
            }
        }
    }

    return small;
}

Compilation message (stderr)

shortcut.cpp: In function 'long long int find_shortcut(int, std::vector<int>, std::vector<int>, int)':
shortcut.cpp:20:28: warning: overflow in conversion from 'double' to '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} changes value from '1.0e+18' to '2147483647' [-Woverflow]
   20 |                     d[i] = 1e18;
      |                            ^~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 14
• Subtask 3: 0 / 8
• Subtask 4: 0 / 7
• Subtask 5: 0 / 33
• Subtask 6: 0 / 22
• Subtask 7: 0 / 4
• Subtask 8: 0 / 3