Submission #879722

#TimeUsernameProblemLanguageResultExecution timeMemory
879722AloraAutobus (COCI22_autobus)C++17
70 / 70
97 ms3928 KiB
#include <bits/stdc++.h> #define Alora "cownav" #define fi(i,a,b) for(int i = a; i <= b; i++) #define fid(i,a,b) for(int i = a; i >= b; i--) #define ll long long #define f first #define se second #define pii pair<int, int> #define getbit(i, j) ((i >> j) & 1) #define all(v) v.begin(), v.end() #define pb push_back #define maxn 75 const int M = 1e9 + 7; using namespace std; int n, m, k, q; ll dp[maxn][maxn][maxn]; int main(){ ios_base::sync_with_stdio(0); cin.tie(NULL); if(fopen(Alora".inp", "r")){ freopen(Alora".inp", "r", stdin); freopen(Alora".out", "w", stdout);} cin >> n >> m; memset(dp, 60, sizeof(dp)); fi(i, 1, n) dp[0][i][i] = 0; fi(i, 1, m){ int a, b, c; cin >> a >> b >> c; dp[1][a][b] = min(dp[1][a][b], 1ll*c); } cin >> k >> q; k = min(k, n - 1); fi(d, 0, k - 1) fi(t, 1, n) fi(u, 1, n) fi(v, 1, n) dp[d + 1][u][v] = min(dp[d + 1][u][v], dp[d][u][t] + dp[1][t][v]); while(q--){ int u, v; cin >> u >> v; ll ans = 1e18; fi(d, 0, k) ans = min(ans, dp[d][u][v]); if(ans != 1e18) cout << ans << '\n'; else cout << -1 << '\n'; } return 0; }

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     freopen(Alora".inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:22:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |     freopen(Alora".out", "w", stdout);}
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
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