Submission #55785

#	Time	Username	Problem	Language	Result	Execution time	Memory
55785		red1108	조개 줍기 (KOI17_shell)	C++17	0 / 100	273 ms	42288 KiB

shell

#include <iostream>
#include <stdio.h>
using namespace std;
long long int dp[1600][1600], seg[1600][6000], input[1600][1600],ans;
int n, si=1;
int query(int x, int y)
{
    int ret=0;
    y=y+si-1;
    while(y){ret+=seg[x][y];y/=2;}
    return ret;
}
void gang(int x, int v, int l, int r, int s, int e, int t)
{
    if(l>r||e<l||r<s) return ;
    if(s<=l&&r<=e) {seg[x][v]+=t;return ;}
    gang(x,v*2,l,(l+r)/2,s,e,t);
    gang(x,v*2+1,((l+r)/2)+1,r,s,e,t);
}
int main()
{
    int i, j,k,inx,iny,s,e,d;
    char ina;
    cin>>n;
    while(si<n) si*=2;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {
            scanf("%d", &input[i][j]);
            dp[i][j]=max(dp[i-1][j],dp[i][j-1])+input[i][j];
            ans=ans+dp[i][j];
        }
    }
    printf("%lld\n", ans);
    for(k=1;k<=n;k++)
    {
        scanf("\n%c %d %d",&ina,&inx,&iny);
        if(ina=='U') d=1;
        else d=-1;
        s=iny;
        for(i=iny+1;i<=n;i++)
        {
            if(max(dp[inx-1][i]+query(inx-1,i),dp[inx][i-1]+query(inx,i-1)+d)==dp[inx][i-1]+query(inx,i-1)+d) continue;
            else break;
        }
        e=i-1;
        gang(inx,1,1,si,s,e,d);
        ans=ans+(e-s+1)*d;
        for(i=inx+1;i<=n;i++)
        {
            while(max(dp[i-1][s]+query(i-1,s),dp[i][s-1]+query(i,s-1))==dp[i][s-1]+query(i,s-1)) s++;
            if(s>e) break;
            for(j=e+1;j<=n;j++)
            {
                if(max(dp[i-1][j]+query(i-1,j),dp[i][j-1]+query(i,j-1)+d)!=dp[i][j-1]+query(i,j-1)+d) break;
            }
            e=j-1;
            if(s>e) break;
            gang(i,1,1,si,s,e,d);
            ans=ans+(e-s+1)*d;
        }
        printf("%lld\n", ans);
    }
}

Compilation message (stderr)

shell.cpp: In function 'int main()':
shell.cpp:30:37: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
             scanf("%d", &input[i][j]);
                         ~~~~~~~~~~~~^
shell.cpp:30:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &input[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~~~~~
shell.cpp:38:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("\n%c %d %d",&ina,&inx,&iny);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 12
• Subtask 2: 0 / 34
• Subtask 3: 0 / 54