제출 #77431

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
77431		Hassoony	Bob (COCI14_bob)	C++17	0 / 120	180 ms	48388 KiB

bob

#include <bits/stdc++.h>
#define F first
#define S second
using namespace std;
typedef long long ll;
typedef double D;
const ll mod=998244353;
const ll inf=(1ll<<61);
const int MX=1009;
int n,m,a[MX][MX],dp[MX][MX];
ll k[MX];
int DP(int x,int y){
    if(x==0)return 1;
    int &ret=dp[x][y];if(ret!=-1)return ret;
    if(a[x-1][y]==a[x][y])return ret=DP(x-1,y)+1;
    return ret=1;
}
ll ans=0;
void solve(int x,int b,int c){
    ans+=DP(x,b);k[b]=1;
    ll l=0;
    for(int j=b+1;j<=c;j++){
        if(DP(x,j)>DP(x,j-1)){
            k[j]=1;
            ans+=l+DP(x,j);
            l=l+DP(x,j);
        }
        else {k[j]=k[j-1]+1;
//            cout<<x<<" "<<j<<" "<<k[j]*DP(x,j)<<endl;
            ans+=k[j]*DP(x,j);
            l=k[j]*DP(x,j);
        }
    }
}
int main(){
    memset(dp,-1,sizeof(dp));
    cin>>n>>m;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            scanf("%d",&a[i][j]);
        }
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            DP(i,j);
        }
    }
//    puts("");
    for(int i=0;i<n;i++){
        int j=0,j1=0;
        while(j1<m){
            while(j1<m&&a[i][j1]==a[i][j])j1++;
            solve(i,j,j1-1);
            j=j1;
        }
    }
    cout<<ans<<endl;
}
/*
5 3
2 2 2
2 2 1
1 1 1
2 1 2
1 2 1
*/

컴파일 시 표준 에러 (stderr) 메시지

bob.cpp: In function 'int main()':
bob.cpp:40:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&a[i][j]);
             ~~~~~^~~~~~~~~~~~~~~

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