Submission #55983

#	Time	Username	Problem	Language	Result	Execution time	Memory
55983		red1108	조개 줍기 (KOI17_shell)	C++17	100 / 100	1687 ms	83216 KiB

shell

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

Compilation message (stderr)

shell.cpp: In function 'int main()':
shell.cpp:33:27: warning: unused variable 'd' [-Wunused-variable]
     ll i, j,k,inx,iny,s,e,d;
                           ^
shell.cpp:35:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld", &n);
     ~~~~~^~~~~~~~~~~~
shell.cpp:42:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%lld", &input[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~~~~~~~
shell.cpp:50:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf(" %c %lld %lld",&ina,&inx,&iny);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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