#include <bits/stdc++.h>
using namespace std;
const int INF = 1000000000;
long long n,m,kk,buy[101][1001],sell[101][1001],graph[101][101],graph2[101][101],profit[101][101];
void floyd(long long adj[101][101]){
for(int k = 1 ; k <= n ; k += 1){
for(int i = 1 ; i <= n ; i += 1){
for(int j = 1 ; j <= n ; j += 1){
adj[i][j] = min(adj[i][j],adj[i][k]+adj[k][j]);
}
}
}
}
int main(){
ios_base::sync_with_stdio(false);
cout.tie(NULL);
cin.tie(NULL);
cin >> n >> m >> kk;
for(int i = 1 ; i <= n ; i += 1){
for(int j = 1 ; j <= n ; j += 1){
graph[i][j] = INF;
}
for(int j = 1 ; j <= kk ; j += 1){
cin >> buy[i][j] >> sell[i][j];
}
}
for(int i = 0 ; i < m ; i += 1){
int a,b,c;
cin >> a >> b >> c;
graph[a][b] = c;
}
floyd(graph);
for(int i = 1 ; i <= n ; i += 1){
for(int j = 1 ; j <= n ; j += 1){
for(int k = 1 ; k <= kk ; k += 1){
if(sell[j][k] != -1 && buy[i][k] != -1){
profit[i][j] = max(profit[i][j],sell[j][k]-buy[i][k]);
}
}
}
}
long long first = 0 , last = INF;
while(last-first > 1){
long long mid = (first+last)/2;
for(int i = 1 ; i <= n ; i += 1){
for(int j = 1 ; j <= n ; j += 1){
graph2[i][j] = mid*graph[i][j] - profit[i][j];
}
}
floyd(graph2);
bool good = false;
for(int i = 1 ; i <= n ; i += 1){
if(graph2[i][i] <= 0){
good = true;
break;
}
}
if(good){
first = mid;
}else{
last = mid;
}
}
cout << first << endl;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
69 ms |
3308 KB |
Output is correct |
| 2 |
Correct |
34 ms |
1260 KB |
Output is correct |
| 3 |
Correct |
35 ms |
1260 KB |
Output is correct |
| 4 |
Correct |
6 ms |
876 KB |
Output is correct |
| 5 |
Correct |
6 ms |
876 KB |
Output is correct |
| 6 |
Correct |
7 ms |
876 KB |
Output is correct |
| 7 |
Correct |
6 ms |
876 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
6 ms |
876 KB |
Output is correct |
| 10 |
Correct |
6 ms |
876 KB |
Output is correct |
| 11 |
Correct |
7 ms |
876 KB |
Output is correct |
| 12 |
Correct |
1 ms |
492 KB |
Output is correct |
| 13 |
Correct |
6 ms |
876 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
876 KB |
Output is correct |
| 2 |
Correct |
6 ms |
896 KB |
Output is correct |
| 3 |
Correct |
6 ms |
876 KB |
Output is correct |
| 4 |
Correct |
6 ms |
876 KB |
Output is correct |
| 5 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
7 ms |
876 KB |
Output is correct |
| 8 |
Correct |
6 ms |
876 KB |
Output is correct |
| 9 |
Correct |
6 ms |
876 KB |
Output is correct |
| 10 |
Correct |
6 ms |
876 KB |
Output is correct |
| 11 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 12 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 13 |
Correct |
6 ms |
876 KB |
Output is correct |
| 14 |
Correct |
6 ms |
876 KB |
Output is correct |
| 15 |
Correct |
9 ms |
1004 KB |
Output is correct |
| 16 |
Correct |
6 ms |
876 KB |
Output is correct |
| 17 |
Correct |
8 ms |
1004 KB |
Output is correct |
| 18 |
Correct |
1 ms |
364 KB |
Output is correct |
| 19 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 20 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 21 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 22 |
Correct |
6 ms |
876 KB |
Output is correct |
| 23 |
Correct |
6 ms |
876 KB |
Output is correct |
| 24 |
Correct |
7 ms |
876 KB |
Output is correct |
| 25 |
Correct |
6 ms |
876 KB |
Output is correct |
| 26 |
Correct |
1 ms |
492 KB |
Output is correct |
| 27 |
Correct |
6 ms |
876 KB |
Output is correct |
| 28 |
Correct |
6 ms |
876 KB |
Output is correct |
| 29 |
Correct |
7 ms |
876 KB |
Output is correct |
| 30 |
Correct |
1 ms |
492 KB |
Output is correct |
| 31 |
Correct |
6 ms |
876 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
43 ms |
1644 KB |
Output is correct |
| 2 |
Correct |
89 ms |
3948 KB |
Output is correct |
| 3 |
Correct |
39 ms |
1644 KB |
Output is correct |
| 4 |
Correct |
44 ms |
1772 KB |
Output is correct |
| 5 |
Correct |
42 ms |
1772 KB |
Output is correct |
| 6 |
Correct |
38 ms |
1516 KB |
Output is correct |
| 7 |
Correct |
8 ms |
1004 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 10 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 11 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 12 |
Correct |
6 ms |
876 KB |
Output is correct |
| 13 |
Correct |
6 ms |
876 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
876 KB |
Output is correct |
| 2 |
Correct |
6 ms |
896 KB |
Output is correct |
| 3 |
Correct |
6 ms |
876 KB |
Output is correct |
| 4 |
Correct |
6 ms |
876 KB |
Output is correct |
| 5 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
7 ms |
876 KB |
Output is correct |
| 8 |
Correct |
6 ms |
876 KB |
Output is correct |
| 9 |
Correct |
6 ms |
876 KB |
Output is correct |
| 10 |
Correct |
6 ms |
876 KB |
Output is correct |
| 11 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 12 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 13 |
Correct |
6 ms |
876 KB |
Output is correct |
| 14 |
Correct |
6 ms |
876 KB |
Output is correct |
| 15 |
Correct |
9 ms |
1004 KB |
Output is correct |
| 16 |
Correct |
6 ms |
876 KB |
Output is correct |
| 17 |
Correct |
43 ms |
1644 KB |
Output is correct |
| 18 |
Correct |
89 ms |
3948 KB |
Output is correct |
| 19 |
Correct |
39 ms |
1644 KB |
Output is correct |
| 20 |
Correct |
44 ms |
1772 KB |
Output is correct |
| 21 |
Correct |
42 ms |
1772 KB |
Output is correct |
| 22 |
Correct |
38 ms |
1516 KB |
Output is correct |
| 23 |
Correct |
8 ms |
1004 KB |
Output is correct |
| 24 |
Correct |
1 ms |
364 KB |
Output is correct |
| 25 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 26 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 27 |
Correct |
7 ms |
1004 KB |
Output is correct |
| 28 |
Correct |
6 ms |
876 KB |
Output is correct |
| 29 |
Correct |
6 ms |
876 KB |
Output is correct |
| 30 |
Correct |
36 ms |
1388 KB |
Output is correct |
| 31 |
Correct |
39 ms |
1664 KB |
Output is correct |
| 32 |
Correct |
55 ms |
2668 KB |
Output is correct |
| 33 |
Correct |
38 ms |
1644 KB |
Output is correct |
| 34 |
Correct |
38 ms |
1644 KB |
Output is correct |
| 35 |
Correct |
38 ms |
1644 KB |
Output is correct |
| 36 |
Correct |
95 ms |
4076 KB |
Output is correct |
| 37 |
Correct |
1 ms |
364 KB |
Output is correct |
| 38 |
Correct |
1 ms |
364 KB |
Output is correct |
| 39 |
Correct |
35 ms |
1388 KB |
Output is correct |
| 40 |
Correct |
47 ms |
1516 KB |
Output is correct |
| 41 |
Correct |
37 ms |
1516 KB |
Output is correct |
| 42 |
Correct |
36 ms |
1388 KB |
Output is correct |
| 43 |
Correct |
36 ms |
1388 KB |
Output is correct |
| 44 |
Correct |
1 ms |
364 KB |
Output is correct |
| 45 |
Correct |
8 ms |
1004 KB |
Output is correct |
| 46 |
Correct |
8 ms |
1004 KB |
Output is correct |
| 47 |
Correct |
8 ms |
1004 KB |
Output is correct |
| 48 |
Correct |
98 ms |
4204 KB |
Output is correct |
| 49 |
Correct |
98 ms |
4204 KB |
Output is correct |
| 50 |
Correct |
1 ms |
364 KB |
Output is correct |
| 51 |
Correct |
69 ms |
3308 KB |
Output is correct |
| 52 |
Correct |
34 ms |
1260 KB |
Output is correct |
| 53 |
Correct |
35 ms |
1260 KB |
Output is correct |
| 54 |
Correct |
6 ms |
876 KB |
Output is correct |
| 55 |
Correct |
6 ms |
876 KB |
Output is correct |
| 56 |
Correct |
7 ms |
876 KB |
Output is correct |
| 57 |
Correct |
6 ms |
876 KB |
Output is correct |
| 58 |
Correct |
1 ms |
492 KB |
Output is correct |
| 59 |
Correct |
6 ms |
876 KB |
Output is correct |
| 60 |
Correct |
6 ms |
876 KB |
Output is correct |
| 61 |
Correct |
7 ms |
876 KB |
Output is correct |
| 62 |
Correct |
1 ms |
492 KB |
Output is correct |
| 63 |
Correct |
6 ms |
876 KB |
Output is correct |
