Submission #1074212

#	Time	Username	Problem	Language	Result	Execution time	Memory
1074212		1ne	Wombats (IOI13_wombats)	C++14	39 / 100	20065 ms	102832 KiB

wombats

#include "wombats.h"
#include <bits/stdc++.h>
using namespace std;
struct node{
  int x,y,d;
};
vector<vector<vector<node>>>adj;
int dist3[200][200];
int n,m;
vector<vector<int>>dist1,dist2;
void init(int R, int C, int H[5000][200], int V[5000][200]) {
    /* ... */
    n = R,m = C;
    dist1.resize(R,vector<int>(C));
    dist2.resize(R,vector<int>(C));
   	adj.resize(R,vector<vector<node>>(C));
    for (int i = 0;i<R;++i){
    	for (int j = 0;j<C - 1;++j){
    		adj[i][j].push_back({i,j + 1,H[i][j]});
    		adj[i][j + 1].push_back({i,j,H[i][j]});
    	}
    }
    for (int i = 0;i<R - 1;++i){
    	for (int j = 0;j<C;++j){
    		adj[i][j].push_back({i + 1,j,V[i][j]});
    		adj[i + 1][j].push_back({i,j,V[i][j]});
    	}
    }
    for (int i = 0;i<n;++i){
    	for (int j = 0;j<m;++j){
    		dist1[i][j] = 1e9,dist2[i][j] = 1e9;
    	}
    }	
    for (int i = 0;i<m;++i){
		priority_queue<pair<int,pair<int,int>>>q;
		q.push({0,{0,i}});
		dist1[0][i] = 0;
		while(!q.empty()){
			auto u = q.top();
			dist2[u.second.first][u.second.second] = 1e9;
			q.pop();
			if (dist1[u.second.first][u.second.second] != -u.first)continue;
			for (auto x:adj[u.second.first][u.second.second]){
				dist2[x.x][x.y] = 1e9;
				if (u.second.first - x.x > 0)continue;
				if (dist1[x.x][x.y] > -u.first + x.d){
					dist1[x.x][x.y] = -u.first + x.d;
					q.push({-dist1[x.x][x.y],{x.x,x.y}});
				}	
			}
		}
		for (int j = 0;j<m;++j){
			dist3[i][j] = dist1[n - 1][j];
		}
		swap(dist1,dist2);
	}	
}

void changeH(int P, int Q, int W) {
	for (auto &x:adj[P][Q]){
		if (x.y == Q + 1){
			x.d = W;
		}
	}
	for (auto &x:adj[P][Q + 1]){
		if (x.y == Q){
			x.d = W;
		}
	}
	for (int i = 0;i<m;++i){
		priority_queue<pair<int,pair<int,int>>>q;
		q.push({0,{0,i}});
		dist1[0][i] = 0;
		while(!q.empty()){
			auto u = q.top();
			q.pop();
			dist2[u.second.first][u.second.second] = 1e9;
			if (dist1[u.second.first][u.second.second] != -u.first)continue;
			for (auto x:adj[u.second.first][u.second.second]){
				dist2[x.x][x.y] = 1e9;
				if (u.second.first - x.x > 0)continue;
				if (dist1[x.x][x.y] > -u.first + x.d){
					dist1[x.x][x.y] = -u.first + x.d;
					q.push({-dist1[x.x][x.y],{x.x,x.y}});
				}	
			}
		}
		for (int j = 0;j<m;++j){
			dist3[i][j] = dist1[n - 1][j];
		}
		swap(dist1,dist2);
	}	    
}

void changeV(int P, int Q, int W) {
    for (auto &x:adj[P][Q]){
		if (x.x == P + 1){
			x.d = W;
		}
    }
    for (auto &x:adj[P + 1][Q]){
		if (x.x == P){
			x.d = W;
		}
	}
	
	for (int i = 0;i<m;++i){
		priority_queue<pair<int,pair<int,int>>>q;
		q.push({0,{0,i}});
		dist1[0][i] = 0;
		while(!q.empty()){
			auto u = q.top();
			q.pop();
			dist2[u.second.first][u.second.second] = 1e9;
			if (dist1[u.second.first][u.second.second] != -u.first)continue;
			for (auto x:adj[u.second.first][u.second.second]){
				dist2[x.x][x.y] = 1e9;
				if (u.second.first - x.x > 0)continue;
				if (dist1[x.x][x.y] > -u.first + x.d){
					dist1[x.x][x.y] = -u.first + x.d;
					q.push({-dist1[x.x][x.y],{x.x,x.y}});
				}	
			}
		}
		for (int j = 0;j<m;++j){
			dist3[i][j] = dist1[n - 1][j];
		}
		swap(dist1,dist2);
	}
}

int escape(int V1, int V2) {
	return dist3[V1][V2];
}

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 0 / 16
• Subtask 4: 18 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 24