Submission #548326

#	Time	Username	Problem	Language	Result	Execution time	Memory
548326		krit3379	Calvinball championship (CEOI15_teams)	C++17	20 / 100	2 ms	644 KiB

teams

#include<bits/stdc++.h>
using namespace std;
#define N 105

long long a[N],p[N][N],ma,ans=1,mod=1e9+7;

int main(){
    int n,i,j,k;
    scanf("%d",&n);
    for(i=1;i<=n;i++)scanf("%lld",&a[i]);
    for(i=1;i<=n;i++)p[0][i]=1;
    for(i=1;i<=n;i++)for(j=1;j<=n;j++)p[i][j]=(j*p[i-1][j]+p[i-1][j+1])%mod;
    for(i=1;i<=n;i++){
        ans=(ans+(a[i]-1)*p[n-i][ma])%mod;
        ma=max(ma,a[i]);
    }
    printf("%lld",ans);
    return 0;
}

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:8:15: warning: unused variable 'k' [-Wunused-variable]
    8 |     int n,i,j,k;
      |               ^
teams.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
teams.cpp:10:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     for(i=1;i<=n;i++)scanf("%lld",&a[i]);
      |                      ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10