Submission #503503

#	Time	Username	Problem	Language	Result	Execution time	Memory
503503		jpark	Feast (NOI19_feast)	C++14	Compilation error	0 ms	0 KiB

feast

#include<iostream>
using namespace std;

int main(){
    int n,k;
    cin >> n >> k;
    int arr[n];
    int pre[n+1];
    int negc = 0;
    int a;
    for(int x=0; x<n; x++){
        cin >> a; arr[x] = a;
        pre[x] = 0;
        if(a<0) ++negc;
    }
    pre[n] = 0;
    int total = 0;
    if(negc==0){
        for(int x=0; x<n; x++){
            total += arr[x];
        }
        cout << total;
        return;
    }
    if(negc==1){
        if(k>=2){
            for(int x=0; x<n; x++){
                if(arr[x]>0){
                    total += arr[x];
                }
            }
            cout << total;
            return;
        }
        else{
            int all = 0;
            for(int x=0; x<n; x++){
                all += arr[x];
            }
            int before,after = 0;
            bool reached = false;
            for(int x=0; x<n; x++){
                if(arr[x]<0){
                    reached = true;
                    continue;
                }
                if(reached){
                    after += arr[x];
                }
                else{
                    before += arr[x];
                }
            }
            total = max(all,max(before,after));
        }
    }
    if(k==1){
        pre[0] = 0;
        for(int x=1; x<n+1; x++){
            pre[x] = pre[x-1]+arr[x-1];
        }
        int l,r = 0;
        while(r<n){
            total = max(total,pre[r]-pre[l]);
            if(l==r){
                ++r;
                continue;
            }
        }
    }
}

Compilation message (stderr)

feast.cpp: In function 'int main()':
feast.cpp:23:9: error: return-statement with no value, in function returning 'int' [-fpermissive]
   23 |         return;
      |         ^~~~~~
feast.cpp:33:13: error: return-statement with no value, in function returning 'int' [-fpermissive]
   33 |             return;
      |             ^~~~~~