oj.uz

Submission #432010

# Submission time Handle Problem Language Result Execution time Memory
432010 2021-06-17T19:03:33 Z Malheiros Nafta (COI15_nafta) C++17
34 / 100
 1000 ms 54632 KB 
#include <bits/stdc++.h>
 
using namespace std;
#define ld long double
#define ll long long
#define FF first.first
#define FS first.second
#define SF second.first
#define SS second.second
#define PB push_back
#define MP make_pair
#define all(cont) cont.begin(),cont.end()
#define rall(cont) cont.rbegin(), cont.rend()
#define FOR(i, j) for(int i=0;i<j;i++)
#define RFOR(i, j) for (int i=j;i>=0;i--)
#define GO cin.tie(NULL);
#define FAST ios_base::sync_with_stdio(false);
typedef pair<int,int> pii;
 
 
// Your function
//DEBBUGGING STUFF, JUST USE deb(a,b,c) and it will print the variables;
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {
    cout << vars << " = ";
    string delim = "";
    (..., (cout << delim << values, delim = ", "));
    cout<<endl;
}
 
 const int maxn=2010;
 int v[maxn][maxn];
 int dp[maxn][maxn];
 int c[maxn];
 int n,m;
 int ccome[maxn];
 int custo[maxn][maxn];
 vector<pair<pii,int>> comecam[maxn];
 vector<pair<pii,int>> terminam[maxn];

 bool valid(int a,int b){
	 if (a<0 || a>=n || b<0 || b>=m || v[a][b]==-1)return false;
	 return true;
 }

 pair<pii,int> bfs(int a,int b){
	 int menor=b;
	 int maior=b;
	 queue<pii> q;
	 int tot=0;
	 q.push({a,b});
	 tot+=v[a][b];
	 v[a][b]=-1;
	while(!q.empty()){
		auto o=q.front();
		q.pop();
		auto i=o.first;
		auto j=o.second;
		if (valid(i+1,j)){
			tot+=v[i+1][j];
			v[i+1][j]=-1;
			q.push({i+1,j});
		}
		if(valid(i-1,j)){
			tot+=v[i-1][j];
			v[i-1][j]=-1;
			q.push({i-1,j});
		}
		if(valid(i,j-1)) {
			tot+=v[i][j-1];
			v[i][j-1]=-1;
			menor=min(menor,j-1);
			q.push({i,j-1});
		}
		if(valid(i,j+1)){
			tot+=v[i][j+1];
			maior=max(maior,j+1);
			v[i][j+1]=-1;
			q.push({i,j+1});
		}
	}
	return MP(MP(menor,maior),tot);
 }

void solve(int i,int l,int r,int searchL,int searchR){
	if(l>r)return;
	int mid=(l+r)/2;
	int validR=min(searchR,mid);
	pii melhor=MP(c[mid],-1);
	for (int j=searchL;j<=validR;j++){
		melhor=max(melhor,MP(dp[i-1][j]+custo[j][mid],j));
	}
	dp[i][mid]=melhor.first;	
	if(melhor.second==-1)return;
	solve(i,l,mid-1,searchL,melhor.second);
	solve(i,mid+1,r,melhor.second,searchR);
}
 
int main(){
	//GO FAST
	scanf("%d%d",&n,&m);
	FOR(i,n){
		FOR(j,m){
			char c;scanf(" %c",&c);
			if (c=='.'){
				v[i][j]=-1;
			}
			else v[i][j]=c-'0';
		}
	}
	vector<pair<pii,int>> ranges;
	FOR(i,n){
		FOR(j,m){
			if(v[i][j]!=-1){
				ranges.PB(bfs(i,j));
			}
		}
	}
	for(auto k:ranges){
		comecam[k.FF].PB(k);
		ccome[k.FF]+=k.second;
	}
	for(auto k:ranges){
		terminam[k.FS].PB(k);
	}
	for(auto k:comecam[0]){
		c[0]+=k.second;
	}
	for (int i=1;i<m;i++){
		c[i]=c[i-1];
		for (auto k:comecam[i])c[i]+=k.second;
		for(auto k:terminam[i-1])c[i]-=k.second;
	}
	for(int j=0;j<m;j++){
		//C[i][j]=C[i][j-1]+comecamaqui[j];
		//custo de ter uma coisa em j menos as coisas que estao em i e j
		custo[0][j]=c[j];
		for(auto k:comecam[0]){
			if (k.FS>=j)custo[0][j]-=k.second;
		}
		for(int i=1;i<j;i++){
			custo[i][j]=custo[i-1][j];
			for(auto k:comecam[i]){
				if(k.FS>=j)custo[i][j]-=k.second;
			}
		}

	}
/*	for(int i=0;i<m;i++){
		for(int j=0;j<m;j++){
			cout<<custo[i][j]<<" ";
		}
		cout<<endl;
	}*/
	int melhor=0;
	for(int i=0;i<m;i++){
		dp[1][i]=c[i];
		melhor=max(melhor,c[i]);
	}
	printf("%d\n",melhor);
	
	for(int i=2;i<=m;i++){
		solve(i,0,m-1,0,m-1);
		int tot=0;
		for(int j=0;j<m;j++){
		tot=max(tot,dp[i][j]);
		}
		printf("%d\n",tot);
	}
	
}

Compilation message

nafta.cpp: In function 'int main()':
nafta.cpp:102:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  102 |  scanf("%d%d",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~
nafta.cpp:105:16: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  105 |    char c;scanf(" %c",&c);
      |           ~~~~~^~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 972 KB Output is correct
2 Correct 1 ms 972 KB Output is correct
3 Correct 2 ms 972 KB Output is correct
4 Correct 1 ms 972 KB Output is correct
5 Correct 1 ms 972 KB Output is correct
6 Correct 1 ms 972 KB Output is correct

Subtask #2
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 972 KB Output is correct
2 Correct 1 ms 972 KB Output is correct
3 Correct 2 ms 972 KB Output is correct
4 Correct 1 ms 972 KB Output is correct
5 Correct 1 ms 972 KB Output is correct
6 Correct 1 ms 972 KB Output is correct
7 Correct 15 ms 5404 KB Output is correct
8 Correct 14 ms 5188 KB Output is correct
9 Correct 12 ms 4888 KB Output is correct
10 Correct 15 ms 5144 KB Output is correct
11 Correct 12 ms 5068 KB Output is correct
12 Correct 11 ms 4812 KB Output is correct

Subtask #3
0 / 66.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 972 KB Output is correct
2 Correct 1 ms 972 KB Output is correct
3 Correct 2 ms 972 KB Output is correct
4 Correct 1 ms 972 KB Output is correct
5 Correct 1 ms 972 KB Output is correct
6 Correct 1 ms 972 KB Output is correct
7 Correct 15 ms 5404 KB Output is correct
8 Correct 14 ms 5188 KB Output is correct
9 Correct 12 ms 4888 KB Output is correct
10 Correct 15 ms 5144 KB Output is correct
11 Correct 12 ms 5068 KB Output is correct
12 Correct 11 ms 4812 KB Output is correct
13 Execution timed out 1091 ms 54632 KB Time limit exceeded
14 Halted 0 ms 0 KB -