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Submission #949035

# Submission time Handle Problem Language Result Execution time Memory
949035 2024-03-18T20:26:45 Z Saul0906 Land of the Rainbow Gold (APIO17_rainbow) C++14
11 / 100
 3000 ms 115988 KB 
#include <bits/stdc++.h>
#include "rainbow.h"
#define rep(a,b,c) for(int a=b; a<c; a++)
#define repa(a,b) for(auto a: b)
#define pii pair<int, int>
#define fi first
#define se second
#define pb push_back

using namespace std;

set<pii> river;
set<int> rows[200005], cols[200005];
vector<pii> nriver;

void init(int R, int C, int sr, int sc, int M, char *S){
	river.clear();
	nriver.clear();
	river.insert({sr,sc});
	rep(i,0,2e5+5){
		cols[i].clear();
		rows[i].clear();
		cols[i].insert(0);
		cols[i].insert(R+1);
		rows[i].insert(0);
		rows[i].insert(C+1);
	}
	rep(i,0,M){
		nriver.pb({sr+1,sc});
		nriver.pb({sr-1,sc});
		nriver.pb({sr,sc+1});
		nriver.pb({sr,sc-1});
		rows[sr].insert(sc);
		cols[sc].insert(sr);
		if(S[i]=='N') sr--;
		else if(S[i]=='S') sr++;
		else if(S[i]=='W') sc--;
		else sc++;
		river.insert({sr,sc});
	}
	nriver.pb({sr+1,sc});
	nriver.pb({sr-1,sc});
	nriver.pb({sr,sc+1});
	nriver.pb({sr,sc-1});
	rows[sr].insert(sc);
	cols[sc].insert(sr);
}

set<pii> vis;
map<pii,pii> dsu;

pii find(pii a){
	if(!dsu.count(a) || dsu[a]==a) return a;
	return dsu[a]=find(dsu[a]);
}

void join(pii a, pii b){
	dsu[find(a)]=find(b);
}

void dfs(int x, int y, int ar, int ac, int br, int bc){
	if(x<ar || x>br || y<ac || y>bc) return;
	vis.insert({x,y});
	join({x,y},{x,y});
	auto it=rows[x].lower_bound(y);
	int y1, y2, x1, x2;
	y2=*it;
	it--;
	y1=*it;
	it=cols[y].lower_bound(x);
	x2=*it;
	it--;
	x1=*it;
	y1=max(y1,ac-1)+1;
	y2=min(y2,bc+1)-1;
	x1=max(x1,ar-1)+1;
	x2=min(x2,br+1)-1;
	if(!river.count({x,y1})) join({x,y},{x,y1});
	if(!river.count({x,y2})) join({x,y},{x,y2});
	if(!river.count({x1,y})) join({x,y},{x1,y});
	if(!river.count({x2,y})) join({x,y},{x2,y});
	if(!river.count({x,y1}) && !vis.count({x,y1})) dfs(x,y1,ar,ac,br,bc);
	if(!river.count({x,y2}) && !vis.count({x,y2})) dfs(x,y2,ar,ac,br,bc);
	if(!river.count({x1,y}) && !vis.count({x1,y})) dfs(x1,y,ar,ac,br,bc);
	if(!river.count({x2,y}) && !vis.count({x2,y})) dfs(x2,y,ar,ac,br,bc);
}

int colour(int ar, int ac, int br, int bc){
	vis.clear();
	dsu.clear();
	int c=0;
	nriver.pb({ar,ac});
	nriver.pb({br,bc});
	repa(e,nriver) if(!river.count(e) && !vis.count(e)){
		if(e.fi<br && !river.count({e.fi+1,e.se})) e.fi++;
		else if(e.fi>ar && !river.count({e.fi-1,e.se})) e.fi--;
		else if(e.se<bc && !river.count({e.fi,e.se+1})) e.se++;
		else if(e.se>ac && !river.count({e.fi,e.se-1})) e.se--;
		dfs(e.fi,e.se,ar,ac,br,bc);
	}
	nriver.pop_back();
	nriver.pop_back();
	repa(e,dsu) if(e.fi==e.se) c++;
	//, cout<<e.fi.fi<<" "<<e.fi.se<<endl;
	return c;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 192 ms 56764 KB Output is correct
2 Correct 799 ms 57036 KB Output is correct
3 Correct 222 ms 56800 KB Output is correct
4 Correct 297 ms 56916 KB Output is correct
5 Correct 888 ms 57192 KB Output is correct
6 Correct 66 ms 56640 KB Output is correct
7 Correct 52 ms 56764 KB Output is correct
8 Correct 51 ms 56756 KB Output is correct
9 Correct 51 ms 56660 KB Output is correct
10 Correct 58 ms 56796 KB Output is correct
11 Correct 499 ms 56904 KB Output is correct
12 Correct 671 ms 57048 KB Output is correct
13 Correct 1116 ms 57324 KB Output is correct
14 Correct 1253 ms 57424 KB Output is correct
15 Correct 51 ms 56656 KB Output is correct
16 Correct 55 ms 56660 KB Output is correct
17 Correct 53 ms 56740 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 56660 KB Output is correct
2 Correct 53 ms 56740 KB Output is correct
3 Execution timed out 3023 ms 70360 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 56656 KB Output is correct
2 Correct 1980 ms 107016 KB Output is correct
3 Correct 593 ms 84820 KB Output is correct
4 Correct 2062 ms 115988 KB Output is correct
5 Correct 651 ms 84436 KB Output is correct
6 Correct 94 ms 64708 KB Output is correct
7 Incorrect 186 ms 69560 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #4
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 192 ms 56764 KB Output is correct
2 Correct 799 ms 57036 KB Output is correct
3 Correct 222 ms 56800 KB Output is correct
4 Correct 297 ms 56916 KB Output is correct
5 Correct 888 ms 57192 KB Output is correct
6 Correct 66 ms 56640 KB Output is correct
7 Correct 52 ms 56764 KB Output is correct
8 Correct 51 ms 56756 KB Output is correct
9 Correct 51 ms 56660 KB Output is correct
10 Correct 58 ms 56796 KB Output is correct
11 Correct 499 ms 56904 KB Output is correct
12 Correct 671 ms 57048 KB Output is correct
13 Correct 1116 ms 57324 KB Output is correct
14 Correct 1253 ms 57424 KB Output is correct
15 Correct 51 ms 56656 KB Output is correct
16 Correct 55 ms 56660 KB Output is correct
17 Correct 53 ms 56740 KB Output is correct
18 Execution timed out 3060 ms 72472 KB Time limit exceeded
19 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 192 ms 56764 KB Output is correct
2 Correct 799 ms 57036 KB Output is correct
3 Correct 222 ms 56800 KB Output is correct
4 Correct 297 ms 56916 KB Output is correct
5 Correct 888 ms 57192 KB Output is correct
6 Correct 66 ms 56640 KB Output is correct
7 Correct 52 ms 56764 KB Output is correct
8 Correct 51 ms 56756 KB Output is correct
9 Correct 51 ms 56660 KB Output is correct
10 Correct 58 ms 56796 KB Output is correct
11 Correct 499 ms 56904 KB Output is correct
12 Correct 671 ms 57048 KB Output is correct
13 Correct 1116 ms 57324 KB Output is correct
14 Correct 1253 ms 57424 KB Output is correct
15 Correct 51 ms 56656 KB Output is correct
16 Correct 55 ms 56660 KB Output is correct
17 Correct 53 ms 56740 KB Output is correct
18 Execution timed out 3060 ms 72472 KB Time limit exceeded
19 Halted 0 ms 0 KB -