Submission #70487

#	Time	Username	Problem	Language	Result	Execution time	Memory
70487		leehosu01	On grid (kriii2_O)	C++17	0 / 4	129 ms	4732 KiB

O

#include<bits/stdc++.h>
using namespace std;
long long MP[301][301],CR[301][301],BF[301][301],CG[302],BG[302],to;
int N,M;
int main()
{
    scanf("%d%d",&N,&M);
    int i,j,k;
    for(i=1;i<=N;i++)
        for(j=1;j<=M;j++)
            BF[i][j]=-(1ll<<30),scanf("%lld",&MP[i][j]);
    CG[M+1]=BG[M+1]=-(1ll<<30);
    for(to=0,j=M;j;j--)BG[j]=BF[j][M]=to+=MP[N][j];
    for(i=N-1;i;i--,swap(CG,BG),swap(CR,BF))
        for(j=1;j<=M;j++)
            for(to=0,CG[k=j]=-(1ll<<30);k<=M;k++)
                CG[j]=max(CG[j],CR[j][k]=max(BF[j][k],BG[k+1])+(to+=MP[i][k]));
    printf("%lld",BG[1]);
}

Compilation message (stderr)

O.cpp: In function 'int main()':
O.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&N,&M);
     ~~~~~^~~~~~~~~~~~~~
O.cpp:11:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             BF[i][j]=-(1ll<<30),scanf("%lld",&MP[i][j]);
             ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 1
• Subtask 2: 0 / 3