Submission #375152

#	Time	Username	Problem	Language	Result	Execution time	Memory
375152		daniel920712	Naan (JOI19_naan)	C++14	0 / 100	1 ms	376 KiB

naan

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <vector>

using namespace std;

long long all[2005][2005];
long long sum[2005][2005]={0};
int main()
{
    long long N,M,a,b,x1,x2,y1,y2,c,i,j;
    scanf("%lld %lld",&N,&M);
    for(i=0;i<N;i++)
    {
        for(j=1;j<=M;j++)
        {
            scanf("%lld",&all[i][j]);
            sum[i][j]=sum[i][j-1]+all[i][j];
        }
    }


    for(i=1;i<=M;i++)
    {
        a=sum[1][i-1];
        b=all[1][i];
        c=sum[1][M];
        a*=2;
        b*=2;
        if(c-a>=0)
        {
            x1=c-a;
            y1=b;
        }

        a=sum[0][M]-sum[0][i+0];
        b=all[0][i];
        c=sum[0][M];
        a*=2;
        b*=2;

        if(a+b-c>=0)
        {
            x2=a+b-c;
            y2=b;
        }

        if(x1*y2<=x2*y1)
        {
            printf("%lld %lld\n",(i-1)*y1+x1,y1);
            printf("2 1\n");
            return 0;
        }

        a=sum[0][i-1];
        b=all[0][i];
        c=sum[0][M];
        a*=2;
        b*=2;
        if(c-a>=0)
        {
            x1=c-a;
            y1=b;
        }

        a=sum[1][M]-sum[1][i+1];
        b=all[1][i];
        c=sum[1][M];
        a*=2;
        b*=2;

        if(a+b-c>=0)
        {
            x2=a+b-c;
            y2=b;
        }

        if(x1*y2<=x2*y1)
        {
            printf("%lld %lld\n",(i-1)*y1+x1,y1);
            printf("1 2\n");
            return 0;
        }
    }
    printf("-1\n");
    return 0;
}

Compilation message (stderr)

naan.cpp: In function 'int main()':
naan.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |     scanf("%lld %lld",&N,&M);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
naan.cpp:18:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   18 |             scanf("%lld",&all[i][j]);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~
naan.cpp:49:14: warning: 'y2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   49 |         if(x1*y2<=x2*y1)
      |            ~~^~~
naan.cpp:49:21: warning: 'x2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   49 |         if(x1*y2<=x2*y1)
      |                   ~~^~~
naan.cpp:51:19: warning: 'x1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   51 |             printf("%lld %lld\n",(i-1)*y1+x1,y1);
      |             ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 24
• Subtask 3: 0 / 71