oj.uz

Submission #638709

# Submission time Handle Problem Language Result Execution time Memory
638709 2022-09-07T04:56:22 Z jamezzz Let's Win the Election (JOI22_ho_t3) C++17
0 / 100
 471 ms 1048576 KB 
#include <bits/stdc++.h>
using namespace std;

#define pf printf
#define sf scanf
typedef long long ll;
typedef long double ld;
typedef pair<int,int> ii;

#define maxn 505
#define INF 1023456789

int n,k,a[maxn],b[maxn];
vector<ii> v;
ld memo[maxn+5][maxn+5][maxn+5];

ld dp(int pos,int ppl,int vote){
	if(pos==n){
		if(vote>=k)return 0;
		else return INF;
	}
	if(memo[pos][ppl][vote]>=0)return memo[pos][ppl][vote];
	ld ans=INF;
	//case 1: dont take
	ans=min(ans,dp(pos+1,ppl,vote));
	//case 2: just get vote
	ans=min(ans,dp(pos+1,ppl,vote+1)+(ld)a[pos]/(ppl+1));
	//case 3: get new person
	if(b[pos]!=INF)ans=min(ans,dp(pos+1,ppl+1,vote+1)+(ld)b[pos]/(ppl+1));
	//pf("%d %d %d: %f\n",pos,ppl,vote,ans);
	return memo[pos][ppl][vote]=ans;
}

int main(){
	sf("%d%d",&n,&k);
	for(int i=0;i<n;++i){
		int x,y;
		sf("%d%d",&x,&y);
		if(y==-1)y=INF;
		v.push_back({y,x});
	}
	sort(v.begin(),v.end());
	for(int i=0;i<n;++i){
		tie(b[i],a[i])=v[i];
	}
	for(int i=0;i<=n;++i){
		for(int j=0;j<=n;++j){
			for(int l=0;l<=n;++l){
				memo[i][j][l]=-1;
			}
		}
	}
	pf("%Lf\n",dp(0,0,0));
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:35:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |  sf("%d%d",&n,&k);
      |    ^
Main.cpp:38:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |   sf("%d%d",&x,&y);
      |     ^

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Runtime error 457 ms 1048576 KB Execution killed with signal 9
6 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Runtime error 457 ms 1048576 KB Execution killed with signal 9
6 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 632 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 1 ms 596 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Incorrect 1 ms 596 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 632 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 1 ms 596 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Incorrect 1 ms 596 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 632 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 1 ms 596 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Incorrect 1 ms 596 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 471 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Runtime error 457 ms 1048576 KB Execution killed with signal 9
6 Halted 0 ms 0 KB -