Submission #1010223

#	Time	Username	Problem	Language	Result	Execution time	Memory
1010223		kyaruru	Calvinball championship (CEOI15_teams)	C++17	0 / 100	3 ms	604 KiB

teams

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const ll mod = 1000007;
int main() {
#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int a;
    cin >> a;
    ll k[a + 1], ans = 0,now=1;
    for (int i = 1; i <= a; i++) cin >> k[i], k[i]--;
    for(int i=a; i>=1; i--){
        ans=(ans+k[i]*now)%mod;
        now=now*i%mod;
    }
    cout<<ans;
}

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:12:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
teams.cpp:13:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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