Submission #524138

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
524138	2022-02-08 17:09:18	shubham20_03	Knapsack (NOI18_knapsack)	C++17	Compilation error	0 ms	0 KiB

knapsack

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#include <bits/stdc++.h>
using namespace std;
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
#define deb(x) cout<<#x<<'='<<x<<'\n';
#define deb2(x,y) cout<<#x<<'='<<x<<", "<<#y<<'='<<y<<'\n';
#define all(x) (x).begin(), (x).end()
#define pii pair<int, int>
#define pb push_back
#define f first
#define s second
#define sz(x) (int)(x).size()
const long double PI = acos(-1);
const int mod = 1e9 + 7;
// usaco guide
signed main() {
    fastio
    freopen("../input1.txt", "r", stdin);
    freopen("../output1.txt", "w", stdout);
    int S, N; cin >> S >> N;
    map<int, vector<pii>> bywt;
    for (int i = 0; i < N; i++) {
        int v, w, k; cin >> v >> w >> k;
        bywt[w].pb({v, k});
    }
    int dp[sz(bywt) + 1][S + 1];
    memset (dp, -1, sizeof(dp));
 
 
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Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:64:16: error: 'n' was not declared in this scope
   64 |     cout << dp[n-1][S] << '\n';
      |                ^
knapsack.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     freopen("../input1.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:20:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     freopen("../output1.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~