Submission #77442

#	Time	Username	Problem	Language	Result	Execution time	Memory
77442		Hassoony	Bob (COCI14_bob)	C++17	120 / 120	552 ms	24296 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];
pair<ll,int>seg[MX*6];
int DP(int x,int y){
    int &ret=dp[x][y];if(ret!=-1)return ret;
    if(x==0)return ret=1;
    if(a[x-1][y]==a[x][y])return ret=DP(x-1,y)+1;
    return ret=1;
}
void up(int node,int l,int r,int ind,int val){
    if(l>ind||r<ind)return;
    if(l==r){
        seg[node]={val,ind};
        return;
    }
    int mid=(l+r)/2;
    up(node*2,l,mid,ind,val);
    up(node*2+1,mid+1,r,ind,val);
    if(seg[node*2].F<seg[node*2+1].F)seg[node]=seg[node*2];
    else seg[node]=seg[node*2+1];
}
pair<ll,int> q(int node,int l,int r,int s,int e){
    if(l>e||r<s)return {1e9+1,0};
    if(l>=s&&r<=e)return seg[node];
    int mid=(l+r)/2;
    pair<ll,int> p1=q(node*2,l,mid,s,e);
    pair<ll,int> p2=q(node*2+1,mid+1,r,s,e);
    if(p1.F<p2.F)return p1;
    return p2;
}
ll ans=0,ret;
void solve(ll l,ll r){
    if(l>r)return;
    pair<ll,int>p=q(1,0,m-1,l,r);
    ans+=(r-l+1)*p.first;
    ans+=(p.first)*abs(l-p.second)*abs(r-p.second);
    solve(l,p.second-1);
    solve(p.second+1,r);
}
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]);
        }
    }
//    puts("");
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            DP(i,j);
        }
    }
    for(int i=0;i<m;i++)up(1,0,m-1,i,1e9+1);
    for(int i=0;i<n;i++){
        int j=0,j1=0;
//        cout<<i<<endl;
        ret=0;
        while(j1<m){
            while(j1<m&&a[i][j1]==a[i][j])j1++;
            for(int k=j;k<j1;k++)up(1,0,m-1,k,dp[i][k]);
            solve(j,j1-1);
            for(int k=j;k<j1;k++)up(1,0,m-1,k,1e9+1);
            j=j1;
        }
//        cout<<ret<<endl;
//        cout<<endl;
    }
    cout<<ans<<endl;
}
/*
5 3
2 2 2
2 2 1
1 1 1
2 1 2
1 2 1
*/

Compilation message (stderr)

bob.cpp: In function 'int main()':
bob.cpp:54:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&a[i][j]);
             ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 12 / 12
• Subtask 3: 12 / 12
• Subtask 4: 12 / 12
• Subtask 5: 12 / 12
• Subtask 6: 12 / 12
• Subtask 7: 12 / 12
• Subtask 8: 12 / 12
• Subtask 9: 12 / 12
• Subtask 10: 12 / 12