Submission #548338

#	Time	Username	Problem	Language	Result	Execution time	Memory
548338		krit3379	Calvinball championship (CEOI15_teams)	C++17	100 / 100	642 ms	600 KiB

teams

#include<bits/stdc++.h>
using namespace std;
#define N 10005

long long a[N],p[2][N],ma[N],ans=1,mod=1e6+7;

int main(){
    int n,i,j,k,now=0,prev;
    scanf("%d",&n);
    for(i=1;i<=n;i++)scanf("%lld",&a[i]);
    for(i=1;i<=n;i++)p[now][i]=1,ma[i]=max(a[i],ma[i-1]);
    for(i=1;i<=n;i++){
        prev=now;
        now=1-now;
        for(j=1;j<=n;j++){
            p[now][j]=(j*p[prev][j]+p[prev][j+1])%mod;
        }
        ans+=(a[n-i+1]-1)*p[prev][ma[n-i]];
        ans%=mod;
    }
    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,now=0,prev;
      |               ^
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: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10