oj.uz

답안 #74039

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
74039 2018-08-29T16:28:27 Z aleksam 말 (IOI15_horses) C++14
54 / 100
 1500 ms 49336 KB 
#include "horses.h"
#include <bits/stdc++.h>
#define MAX_N 500000
#define MOD 1000000007
#define INF 1000000000
#define debug 0
using namespace std;

int segtree[4*MAX_N], N;
long long X[MAX_N], Y[MAX_N];
long long partX[4*MAX_N];

struct classcomp {
  bool operator() (const int& lhs, const int& rhs) const
  {return lhs>rhs;}
};

set<int, classcomp> S;//Skup indexa na kojima X[i]>1
int partXX(int a);
void printtree(){
	if(debug){
		for(int i=0; i<4*N; ++i){
			printf("%*d ", 3, i);
		}
		printf("\n");
		for(int i=0; i<4*N; ++i){	
			printf("%*d ", 3, segtree[i]);
		}
		printf("\n");
		for(int i=0; i<4*N; ++i){
			printf("%*d ", 3, partX[i]);
		}
		printf("\n");
	}
}

void maketree(int l, int r, int v){
	if(l+1>=r){
		if(l==r-1){
			segtree[v]=l;
			partX[v]=X[l];
			return;
		}
		/*segtree[v]=-1;
		partX[v]=1;*/
		assert(0);
		return;
	}
	int mid=(l+r)/2;
	maketree(l, mid, 2*v+1);
	maketree(mid, r, 2*v+2);
	partX[v]=partX[2*v+1]*partX[2*v+2];
	partX[v]%=MOD;
	if(segtree[2*v+1]==-1){
		segtree[v]=segtree[2*v+2];
		return;
	}
	if(segtree[2*v+2]==-1){
		segtree[v]=segtree[2*v+1];
		return;
	}
	segtree[v]=Y[segtree[2*v+1]]>Y[segtree[2*v+2]]?segtree[2*v+1]:segtree[2*v+2];
	return;
}

int query(int ql, int qr, int l, int r, int v){
	//if(debug)printf("rmq(%d, %d, %d, %d)\n", ql, qr, l, r);
	if(ql>=r || qr<=l){
		return -1;
	}
	if(ql<=l  && r<=qr){
		return segtree[v];
	}
	int q1, q2;
	q1=query(ql, qr, l, (l+r)/2, 2*v+1);
	q2=query(ql, qr, (l+r)/2, r, 2*v+2);
	if(q1==-1)return q2;
	if(q2==-1)return q1;
	return Y[q1]>Y[q2]?q1:q2;
}

int partquery(int ql, int qr, int l, int r, int v){
	if(ql>=r || qr<=l){
		return 1;
	}
	if(ql<=l  && r<=qr){
		return partX[v];
	}
	long long q1, q2;
	q1=partquery(ql, qr, l, (l+r)/2, 2*v+1);
	q2=partquery(ql, qr, (l+r)/2, r, 2*v+2);
	return (q1*q2)%MOD;
}

void updatetree(int l, int r, int v, int x){
	if(l+1>=r){
		return;
	}
	if(l<=x && x<r){
		updatetree(l, (l+r)/2, 2*v+1, x);
		updatetree((l+r)/2, r, 2*v+2, x);
		if(segtree[2*v+1]==-1){
			segtree[v]=segtree[2*v+2];
			return;
		}
		if(segtree[2*v+2]==-1){
			segtree[v]=segtree[2*v+1];
			return;
		}
		segtree[v]=Y[segtree[2*v+1]]>Y[segtree[2*v+2]]?segtree[2*v+1]:segtree[2*v+2];
	}
}

void updatepart(int l, int r, int v, int x){
	//printf("updatepart(%d, %d, %d);\n", l, r, x);
	if(l+1>=r){
		if(l==x)partX[v]=X[x];
		return;
	}
	if(l<=x && x<r){
		updatepart(l, (l+r)/2, 2*v+1, x);
		updatepart((l+r)/2, r, 2*v+2, x);
		partX[v]=(partX[2*v+1]*partX[2*v+2])%MOD;
	}
}

int rmq(int ql, int qr){//Vraca index!!!
	//printf("rmq(%d, %d)\n", ql, qr);
	int max=0, indmax=-1;
	for(int i=ql; i<qr; ++i){
		if(Y[i]>max){
			max=Y[i];
			indmax=i;
		}
	}
	return indmax;
	//return query(ql, qr, 0, N, 0);
}

int partXX(int pos){
	/*long long ret=1;
	for(int i=0; i<pos+1; ++i){
		ret*=X[i];
		if(ret>MOD)ret%=MOD;
	}
	return ret;*/
	return partquery(0, pos+1, 0, N, 0);
}

int buff[50];//Indexi svih X-eva koji su veci od 1
int num_big=0;

int solve(){
	//Moze brze
	long long pi=1;
	int ind=0;
	for(auto i:S){
		pi*=X[i];
		buff[ind++]=i;
		if(pi>INF)break;
	}
	if(pi<INF)buff[ind++]=0;
	reverse(buff, buff+ind);
	/*if(pi<INF){
		big.clear();
		big.push_back(0);
		for(auto i:S){
			big.push_back(i);
		}
	}*/
	pi=1;
	int *big=buff;
	int d=ind;
	if(debug){
		for(int i=0; i<d; ++i)printf("%d ", buff[i]);
		printf("\n");
	}
	long long totmax=0, indmax=-1;
	for(int i=0; i<d; ++i){
		long long maxy;
		if(i!=d-1){
			maxy=rmq(big[i], big[i+1]);
		}
		else {
			maxy=rmq(big[i], N);
			//printf("ovde\n");
		}
		//if(debug){printf("Iteracija i=%d, big[i]=%d, maxy=%d, pi=%d\n", i, big[i], maxy, pi);}
		if(i!=0)pi*=X[big[i]];
		if((long long)Y[maxy]*pi>totmax){
			totmax=(long long)Y[maxy]*pi;
			indmax=maxy;
		}
		
	}
	if(debug){
		//printf("totmax=%d, indmax=%d\n", totmax, indmax);
		//printf("partXX(indmax)=%d\n", partXX(indmax));
	}
	long long res=(long long)Y[indmax]*partXX(indmax);
	return res%MOD;
}

int init(int n, int x[], int y[]) {
	N=n;
	for(int i=0; i<N; ++i){
		X[i]=x[i];
		Y[i]=y[i];
		if(X[i]>1){
			S.insert(i);
		}
	}
	maketree(0, N, 0);
	printtree();
	return solve();
}

int updateX(int pos, int val) {
	if(X[pos]==1 && val>1){
		S.insert(pos);
		X[pos]=val;
		updatepart(0, N, 0, pos);
	}
	else if(X[pos]>1 && val==1){
		S.erase(pos);
		X[pos]=1;
		updatepart(0, N, 0, pos);
	}
	else if(X[pos]>1 && val>1){
		X[pos]=val;
		updatepart(0, N, 0, pos);
	}
	printtree();
	return solve();
}

int updateY(int pos, int val) {
	Y[pos]=val;
	updatetree(0, N, 0, pos);
	printtree();
	return solve();
}

Compilation message

horses.cpp: In function 'void printtree()':
horses.cpp:31:30: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long long int' [-Wformat=]
    printf("%*d ", 3, partX[i]);
                      ~~~~~~~~^
horses.cpp: In function 'int partquery(int, int, int, int, int)':
horses.cpp:87:17: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
   return partX[v];
          ~~~~~~~^
horses.cpp:92:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return (q1*q2)%MOD;
                ^
horses.cpp: In function 'int rmq(int, int)':
horses.cpp:132:11: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
    max=Y[i];
        ~~~^
horses.cpp: In function 'int solve()':
horses.cpp:200:50: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  long long res=(long long)Y[indmax]*partXX(indmax);
                                                  ^
horses.cpp:201:12: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return res%MOD;
            ^

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 248 KB Output is correct
2 Correct 3 ms 364 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 3 ms 432 KB Output is correct
5 Correct 3 ms 560 KB Output is correct
6 Correct 3 ms 560 KB Output is correct
7 Correct 3 ms 560 KB Output is correct
8 Correct 2 ms 560 KB Output is correct
9 Correct 2 ms 560 KB Output is correct
10 Correct 3 ms 648 KB Output is correct
11 Correct 3 ms 648 KB Output is correct
12 Correct 3 ms 648 KB Output is correct
13 Correct 3 ms 648 KB Output is correct
14 Correct 2 ms 648 KB Output is correct
15 Correct 2 ms 648 KB Output is correct
16 Correct 2 ms 648 KB Output is correct
17 Correct 2 ms 728 KB Output is correct
18 Correct 2 ms 728 KB Output is correct
19 Correct 3 ms 728 KB Output is correct
20 Correct 2 ms 728 KB Output is correct

Subtask #2
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 728 KB Output is correct
2 Correct 2 ms 728 KB Output is correct
3 Correct 2 ms 728 KB Output is correct
4 Correct 2 ms 728 KB Output is correct
5 Correct 2 ms 728 KB Output is correct
6 Correct 2 ms 728 KB Output is correct
7 Correct 2 ms 728 KB Output is correct
8 Correct 2 ms 728 KB Output is correct
9 Correct 2 ms 728 KB Output is correct
10 Correct 2 ms 728 KB Output is correct
11 Correct 2 ms 728 KB Output is correct
12 Correct 2 ms 728 KB Output is correct
13 Correct 3 ms 728 KB Output is correct
14 Correct 2 ms 728 KB Output is correct
15 Correct 2 ms 728 KB Output is correct
16 Correct 2 ms 728 KB Output is correct
17 Correct 2 ms 728 KB Output is correct
18 Correct 3 ms 728 KB Output is correct
19 Correct 2 ms 728 KB Output is correct
20 Correct 2 ms 728 KB Output is correct
21 Correct 3 ms 728 KB Output is correct
22 Correct 3 ms 728 KB Output is correct
23 Correct 4 ms 728 KB Output is correct
24 Correct 3 ms 728 KB Output is correct
25 Correct 3 ms 776 KB Output is correct
26 Correct 4 ms 780 KB Output is correct
27 Correct 4 ms 780 KB Output is correct
28 Correct 3 ms 828 KB Output is correct
29 Correct 4 ms 828 KB Output is correct
30 Correct 4 ms 828 KB Output is correct
31 Correct 5 ms 828 KB Output is correct
32 Correct 4 ms 828 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 326 ms 49232 KB Output is correct
2 Correct 368 ms 49336 KB Output is correct
3 Correct 318 ms 49336 KB Output is correct
4 Correct 333 ms 49336 KB Output is correct

Subtask #4
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 49336 KB Output is correct
2 Correct 2 ms 49336 KB Output is correct
3 Correct 2 ms 49336 KB Output is correct
4 Correct 3 ms 49336 KB Output is correct
5 Correct 2 ms 49336 KB Output is correct
6 Correct 2 ms 49336 KB Output is correct
7 Correct 2 ms 49336 KB Output is correct
8 Correct 2 ms 49336 KB Output is correct
9 Correct 3 ms 49336 KB Output is correct
10 Correct 3 ms 49336 KB Output is correct
11 Correct 3 ms 49336 KB Output is correct
12 Correct 3 ms 49336 KB Output is correct
13 Correct 3 ms 49336 KB Output is correct
14 Correct 3 ms 49336 KB Output is correct
15 Correct 2 ms 49336 KB Output is correct
16 Correct 3 ms 49336 KB Output is correct
17 Correct 3 ms 49336 KB Output is correct
18 Correct 3 ms 49336 KB Output is correct
19 Correct 3 ms 49336 KB Output is correct
20 Correct 2 ms 49336 KB Output is correct
21 Correct 2 ms 49336 KB Output is correct
22 Correct 2 ms 49336 KB Output is correct
23 Correct 3 ms 49336 KB Output is correct
24 Correct 3 ms 49336 KB Output is correct
25 Correct 4 ms 49336 KB Output is correct
26 Correct 2 ms 49336 KB Output is correct
27 Correct 3 ms 49336 KB Output is correct
28 Correct 3 ms 49336 KB Output is correct
29 Correct 5 ms 49336 KB Output is correct
30 Correct 4 ms 49336 KB Output is correct
31 Correct 5 ms 49336 KB Output is correct
32 Correct 5 ms 49336 KB Output is correct
33 Correct 126 ms 49336 KB Output is correct
34 Correct 59 ms 49336 KB Output is correct
35 Correct 286 ms 49336 KB Output is correct
36 Correct 245 ms 49336 KB Output is correct
37 Correct 336 ms 49336 KB Output is correct
38 Correct 129 ms 49336 KB Output is correct
39 Execution timed out 1576 ms 49336 KB Time limit exceeded
40 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 49336 KB Output is correct
2 Correct 2 ms 49336 KB Output is correct
3 Correct 3 ms 49336 KB Output is correct
4 Correct 5 ms 49336 KB Output is correct
5 Correct 2 ms 49336 KB Output is correct
6 Correct 3 ms 49336 KB Output is correct
7 Correct 3 ms 49336 KB Output is correct
8 Correct 4 ms 49336 KB Output is correct
9 Correct 2 ms 49336 KB Output is correct
10 Correct 2 ms 49336 KB Output is correct
11 Correct 2 ms 49336 KB Output is correct
12 Correct 4 ms 49336 KB Output is correct
13 Correct 2 ms 49336 KB Output is correct
14 Correct 2 ms 49336 KB Output is correct
15 Correct 2 ms 49336 KB Output is correct
16 Correct 3 ms 49336 KB Output is correct
17 Correct 2 ms 49336 KB Output is correct
18 Correct 4 ms 49336 KB Output is correct
19 Correct 4 ms 49336 KB Output is correct
20 Correct 4 ms 49336 KB Output is correct
21 Correct 3 ms 49336 KB Output is correct
22 Correct 3 ms 49336 KB Output is correct
23 Correct 3 ms 49336 KB Output is correct
24 Correct 3 ms 49336 KB Output is correct
25 Correct 4 ms 49336 KB Output is correct
26 Correct 5 ms 49336 KB Output is correct
27 Correct 4 ms 49336 KB Output is correct
28 Correct 3 ms 49336 KB Output is correct
29 Correct 5 ms 49336 KB Output is correct
30 Correct 4 ms 49336 KB Output is correct
31 Correct 4 ms 49336 KB Output is correct
32 Correct 5 ms 49336 KB Output is correct
33 Correct 307 ms 49336 KB Output is correct
34 Correct 334 ms 49336 KB Output is correct
35 Correct 339 ms 49336 KB Output is correct
36 Correct 313 ms 49336 KB Output is correct
37 Correct 97 ms 49336 KB Output is correct
38 Correct 48 ms 49336 KB Output is correct
39 Correct 258 ms 49336 KB Output is correct
40 Correct 250 ms 49336 KB Output is correct
41 Correct 368 ms 49336 KB Output is correct
42 Correct 125 ms 49336 KB Output is correct
43 Execution timed out 1575 ms 49336 KB Time limit exceeded
44 Halted 0 ms 0 KB -