Submission #1365938

#	Time	Username	Problem	Language	Result	Execution time	Memory
1365938		kmath628	Exam (eJOI20_exam)	C++20	14 / 100	669 ms	428 KiB

exam

#include <bits/stdc++.h>
using namespace std;
int a[209],b[209],a0[209];
int main(){
    int n,i,j,l,r,d,ans=0;
    scanf("%d",&n);
    for(i=1;i<=n;i++) scanf("%d",&a0[i]);
    for(i=1;i<=n;i++) scanf("%d",&b[i]);
    for(int t=1;t<=100000;t++){
        for(i=1;i<=n;i++) a[i]=a0[i];
        for(j=1;j<=20;j++){
            l=rand()%n+1;
            r=rand()%n+1;
            //printf("l=%d r=%d\n",l,r);
            if(l<=r){
                int mx=0;
                for(int k=l;k<=r;k++){
                    mx=max(mx,a[k]);
                }
                for(int k=l;k<=r;k++) a[k]=mx;
                int cnt=0;
                for(int k=1;k<=n;k++){
                    cnt+=(int)(a[k]==b[k]);
                }
                ans=max(ans,cnt);
            }
        }
    }
    printf("%d\n",ans);
    return 0;
}

Compilation message (stderr)

exam.cpp: In function 'int main()':
exam.cpp:6:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
exam.cpp:7:28: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |     for(i=1;i<=n;i++) scanf("%d",&a0[i]);
      |                       ~~~~~^~~~~~~~~~~~~
exam.cpp:8:28: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     for(i=1;i<=n;i++) scanf("%d",&b[i]);
      |                       ~~~~~^~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 16
• Subtask 6: 0 / 22