| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 728337 |
2023-04-22T07:48:22 Z |
bLIC |
Nafta (COI15_nafta) |
C++17 |
|
1000 ms |
43664 KB |
/**
* Author: Anil Byar
**/
#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
// template<class T>
// using ordered_set = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)(x).size()
#define uniq(v) v.erase(unique(all(v)), v.end())
#define ft first
#define sd second
#define pb push_back
// Source: https://codeforces.com/blog/entry/68809
// { start
void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '"' << x << '"';}
void __print(const string &x) {cerr << '"' << x << '"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif
// } end
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef vector<ll> vl;
typedef vector<pll> vll;
typedef vector<vi> vvi;
typedef vector<vii> vvii;
typedef vector<vl> vvl;
#define dbg if(0)
const ll MOD = 1e9+7;
const ll MOD9 = 998244353;
const ll INFLL = 1e18+5;
const int INF = 1e9;
void printbit(int x, int len) {string s="\n";while(len--){s=((x%2)?'1':'0')+s;x/=2;} cout<<s;}
ll power(ll x, ll y, ll mod){if (y==0) return 1;ll ret = power(x, y/2, mod);ret *= ret;ret%=mod;if (y&1) ret *= x;return ret%mod;}
ll modinv(ll x, ll mod = MOD) {return power(x, mod-2, mod);}
template<class T>
istream& operator>>(istream&in, vector<T>&v){
for (T& x:v) in>>x;
return in;
}
template<class T>
ostream& operator<<(ostream&out, vector<T>&v){
for (T& x:v) out<<x<<' ';
cout<<'\n';
return out;
}
// use ?: with brackets (?:)
// check for overflow
// think about dp
// Read the statement carefully
const int N = 2005;
int ver[] = {1, 0, 0, -1};
int hor[] = {0, 1, -1, 0};
void solve(){
int n, m;cin>>n>>m;
string s[N];
char grid[N][N];
memset(grid, 0, sizeof(grid));
for (int i = 1;i<=n;i++) {
cin>>s[i];
for (int j = 0;j<m;j++) grid[i][j+1] = s[i][j];
}
bool vis[N][N];
memset(vis, 0, sizeof(vis));
int l, r;
int profit;
function<void(int, int)> dfs = [&](int row, int col){
if (row<1 || row>n || col<1 || col>m || vis[row][col] || grid[row][col]=='.') return;
vis[row][col] = true;
l = min(l, col);
r = max(r, col);
profit += grid[row][col] - '0';
for (int i = 0;i<4;i++){
dfs(row+ver[i], col+hor[i]);
}
};
ll totprofit[N][N];
memset(totprofit, 0, sizeof(totprofit));
for (int i = 1;i<=n;i++){
for (int j = 1;j<=m;j++){
if (grid[i][j]!='.' && !vis[i][j]){
l = r = j;
profit = 0;
dfs(i, j);
totprofit[0][l] += profit;
totprofit[l][l] -= profit;
totprofit[0][r+1] -= profit;
totprofit[l][r+1] += profit;
debug(i, j, profit);
}
}
}
for (int i = 1;i<=max(m, n);i++) totprofit[0][i] += totprofit[0][i-1], totprofit[i][0] += totprofit[i-1][0];
for (int i = 1;i<=m;i++){
for (int j = 1;j<=m;j++){
totprofit[i][j] += totprofit[i-1][j] + totprofit[i][j-1] - totprofit[i-1][j-1];
debug(i, j, totprofit[i][j]);
}
}
vector<ll> olddp(m+1), newdp(m+1);
for (int i = 1;i<=m;i++) olddp[i] = totprofit[0][i];
debug(olddp);
function<void(int, int, int, int)> dac = [&](int l, int r, int lx, int rx){
if (l>r) return;
int mid = (l+r)/2;
pll best = {olddp[mid], 1};
debug(l, r, lx, rx);
for (int i = lx;i<min(mid, rx+1);i++){
if (olddp[i]<0) continue;
best = max(best, {olddp[i] + totprofit[i][mid], i});
debug(mid, best, i);
}
newdp[mid] = best.first;
int ind = best.second;
dac(l, mid-1, lx, ind);
dac(mid+1, r, ind, rx);
};
cout<<*max_element(all(olddp))<<'\n';
for (int i = 1;i<m;i++){
dac(1, m, 1, m);
olddp = newdp;
debug(i, olddp);
cout<<*max_element(all(olddp))<<'\n';
}
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
#define ONLINE_JUDGE
#ifndef ONLINE_JUDGE
freopen("input.in", "r", stdin);
freopen("output.out", "w", stdout);
freopen("debug.dbg", "w", stderr);
int tt = clock();
#endif
int t=1, i = 1;
// cin>>t;
while(t--){
// cout<<"Case #"<<i++<<": ";
solve();
cout<<'\n';
}
#ifndef ONLINE_JUDGE
cerr << "TIME = " << (float)(clock() - tt)/CLOCKS_PER_SEC << endl;
tt = clock();
#endif
}
Compilation message
nafta.cpp: In function 'int main()':
nafta.cpp:191:14: warning: unused variable 'i' [-Wunused-variable]
191 | int t=1, i = 1;
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
239 ms |
40268 KB |
Output is correct |
| 2 |
Correct |
239 ms |
40212 KB |
Output is correct |
| 3 |
Correct |
227 ms |
40272 KB |
Output is correct |
| 4 |
Correct |
239 ms |
40144 KB |
Output is correct |
| 5 |
Correct |
247 ms |
40232 KB |
Output is correct |
| 6 |
Correct |
228 ms |
40204 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
239 ms |
40268 KB |
Output is correct |
| 2 |
Correct |
239 ms |
40212 KB |
Output is correct |
| 3 |
Correct |
227 ms |
40272 KB |
Output is correct |
| 4 |
Correct |
239 ms |
40144 KB |
Output is correct |
| 5 |
Correct |
247 ms |
40232 KB |
Output is correct |
| 6 |
Correct |
228 ms |
40204 KB |
Output is correct |
| 7 |
Execution timed out |
1074 ms |
43664 KB |
Time limit exceeded |
| 8 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
239 ms |
40268 KB |
Output is correct |
| 2 |
Correct |
239 ms |
40212 KB |
Output is correct |
| 3 |
Correct |
227 ms |
40272 KB |
Output is correct |
| 4 |
Correct |
239 ms |
40144 KB |
Output is correct |
| 5 |
Correct |
247 ms |
40232 KB |
Output is correct |
| 6 |
Correct |
228 ms |
40204 KB |
Output is correct |
| 7 |
Execution timed out |
1074 ms |
43664 KB |
Time limit exceeded |
| 8 |
Halted |
0 ms |
0 KB |
- |
