Submission #1056792

#	Time	Username	Problem	Language	Result	Execution time	Memory
1056792		tolbi	Catfish Farm (IOI22_fish)	C++17	9 / 100	1099 ms	117068 KiB

fish

#include "fish.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
long long max_weights(int32_t N, int32_t M, std::vector<int32_t> X, std::vector<int32_t> Y,
	std::vector<int32_t> W) {
	vector<vector<pair<int,int>>> poses(N);
	vector<int> minel(N,N);
	for (int i = 0; i < M; ++i)
	{
		minel[X[i]]=min(minel[X[i]],(int)Y[i]);
		poses[X[i]].push_back({Y[i],W[i]});
	}
	for (int i = 0; i < N; ++i)
	{
		if (minel[i]) poses[i].push_back({0,0});
		sort(poses[i].begin(), poses[i].end());
		poses[i].push_back({N,0});
	}
	vector<vector<vector<int>>> dp(N);
	for (int i = 0; i < N; ++i)
	{
		dp[i].resize(poses[i].size(),vector<int>(3,-1));
	}
	vector<vector<int>> pref(N);
	for (int i = 0; i < N; ++i)
	{
		pref[i].resize(poses[i].size());
		for (int j = 0; j < pref[i].size(); j++){
			pref[i][j]=poses[i][j].second;
			if (j) pref[i][j]+=pref[i][j-1];
		}
	}
	function<int(int,int,int)> query = [&](int node, int l, int r)->int{
		if (l>r) return 0;
		int ans = 0;
		for (int i = 0; i < poses[node].size(); i++){
			if (poses[node][i].first>=l && poses[node][i].first<=r){
				ans+=poses[node][i].second;
			}
		}return ans;
	};
	function<int(int,int,int)> f = [&](int pos, int node, int flag)->int{
		if (pos==N) return 0;
		if (dp[pos][node][flag]!=-1) return dp[pos][node][flag];
		dp[pos][node][flag]=0;
		if (flag<=1){
			//0 artiyo
			//1 artiyo, arkadan ekleme
			if (node+1<dp[pos].size()){
				//bi yukari git
				int cur = f(pos,node+1,flag);
				if (flag==0 && pos){
					cur+=query(pos-1,poses[pos][node].first,poses[pos][node+1].first-1);
				}
				dp[pos][node][flag]=max(dp[pos][node][flag],cur);
			}
		}
		else {
			assert(node>0 && poses[pos][node].first>0);
			if (poses[pos][node-1].first>0){
				dp[pos][node][flag]=max(dp[pos][node][flag],f(pos,node-1,flag)+poses[pos][node-1].second);
			}
		}
		if (pos+1<N){
			int buyu = lower_bound(poses[pos+1].begin(),poses[pos+1].end(),pair<int,int>{poses[pos][node].first,0})-poses[pos+1].begin();
			if (flag<=1 && buyu<poses[pos+1].size()){
				dp[pos][node][flag]=max(dp[pos][node][flag],f(pos+1,buyu,0)+query(pos,poses[pos][node].first,poses[pos+1][buyu].first-1));
				if (buyu>0){
					dp[pos][node][flag]=max(dp[pos][node][flag],f(pos+1,buyu,2)+query(pos,poses[pos][node].first,poses[pos+1][buyu].first-1));
				}
			}
			if (buyu==poses[pos+1].size() || poses[pos+1][buyu].first!=poses[pos][node].first) buyu--;
			if (buyu>0){
				dp[pos][node][flag]=max(dp[pos][node][flag],f(pos+1,buyu,2))+query(pos+1,poses[pos+1][buyu].first,poses[pos][node].first-1);
			}
		}
		if (pos+2<N){
			dp[pos][node][flag]=max(dp[pos][node][flag],f(pos+2,0,0));
			dp[pos][node][flag]=max(dp[pos][node][flag],f(pos+2,0,1)+query(pos+1,0,poses[pos][node].first-1));
		}
		else if (pos+1<N) {
			dp[pos][node][flag]=max(dp[pos][node][flag],query(pos+1,0,poses[pos][node].first-1));
		}
		return dp[pos][node][flag];
	};
	return f(0,0,0);
}

Compilation message (stderr)

fish.cpp: In function 'long long int max_weights(int32_t, int32_t, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:29:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |   for (int j = 0; j < pref[i].size(); j++){
      |                   ~~^~~~~~~~~~~~~~~~
fish.cpp: In lambda function:
fish.cpp:37:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |   for (int i = 0; i < poses[node].size(); i++){
      |                   ~~^~~~~~~~~~~~~~~~~~~~
fish.cpp: In lambda function:
fish.cpp:50:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |    if (node+1<dp[pos].size()){
      |        ~~~~~~^~~~~~~~~~~~~~~
fish.cpp:67:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |    if (flag<=1 && buyu<poses[pos+1].size()){
      |                   ~~~~^~~~~~~~~~~~~~~~~~~~
fish.cpp:73:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |    if (buyu==poses[pos+1].size() || poses[pos+1][buyu].first!=poses[pos][node].first) buyu--;
      |        ~~~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 3
• Subtask 2: 0 / 6
• Subtask 3: 9 / 9
• Subtask 4: 0 / 14
• Subtask 5: 0 / 21
• Subtask 6: 0 / 17
• Subtask 7: 0 / 14
• Subtask 8: 0 / 16