oj.uz

답안 #49569

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
49569 2018-05-31T10:35:15 Z hamzqq9 Jakarta Skyscrapers (APIO15_skyscraper) C++14
0 / 100
 4 ms 1384 KB 
#include<bits/stdc++.h>
#define lf double
#define ll long long
#define cc pair<char,char>
#define ull unsigned ll
#define ii pair<int,int>
#define li pair<ll,int>
#define iii pair<ii,int>
#define iiii pair<ii,ii>
#define iiii2 pair<int,iii>
#define lii pair<ll,ii>
#define lolo pair<ll,ll>
#define heap priority_queue
#define mp make_pair
#define st first
#define nd second
#define pb push_back
#define pf push_front
#define ppb pop_back
#define ppf pop_front
#define all(x) x.begin(),x.end()
#define len(x) strlen(x)
#define sz(x) (int) x.size()
#define orta ((bas+son)/2)
#define min3(x,y,z) min(min(x,y),z)
#define max3(x,y,z) max(max(x,y),z)
#define umin(x,y) x=min(x,y)
#define umax(x,y) x=max(x,y)
#define dbgs(x) cerr<<(#x)<<" --> "<<(x)<<" "
#define dbg(x) cerr<<(#x)<<" --> "<<(x)<<endl;getchar()
#define MOD 1000000007
#define inf 1000000005
#define M 10000002
#define N 30005
#define LOG 40
#define magic 100
#define KOK 250
#define EPS 0.0025
#define pw(x) ((1ll)<<(x))
#define PI 3.1415926535
using namespace std;

int n,m,b,p;
int dst[N];
vector<int> go[N];

int main() {
 
 	#if 0
	freopen("input.txt","r",stdin);
 	#endif

	scanf("%d %d",&n,&m);

	for(int i=1;i<=m;i++) {

		scanf("%d %d",&b,&p);

		go[b].pb(p);

	}

	for(int i=0;i<n;i++) {

		sort(all(go[i]));

		unique(all(go[i]));

	}

	fill(dst,dst+N,inf);

	heap<ii> H;

	H.push({0,0});

	dst[0]=0;

	while(!H.empty()) {

		ii x=H.top();

		H.pop();

		if(dst[x.nd]<-x.st) continue ;

		if(x.nd==1) {

			printf("%d",dst[x.nd]);
			
			return 0;

		}

		for(int p:go[x.nd]) {

			for(int i=x.nd+p;i<n;i+=p) {

				umin(dst[i],-x.st+(i-x.nd)/p);

				H.push({x.st-(i-x.nd)/p,i});

				if(binary_search(all(go[i]),p)) break ;


			}

			for(int i=x.nd-p;i>=0;i-=p) {

				umin(dst[i],-x.st+(x.nd-i)/p);

				H.push({x.st-(x.nd-i)/p,i});

				if(binary_search(all(go[i]),p)) break ;

			}

		} 

	}

	printf("-1");

}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:53:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~~
skyscraper.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&b,&p);
   ~~~~~^~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1148 KB Output is correct
2 Incorrect 3 ms 1252 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1252 KB Output is correct
2 Incorrect 2 ms 1252 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1284 KB Output is correct
2 Incorrect 3 ms 1360 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1360 KB Output is correct
2 Incorrect 3 ms 1360 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1384 KB Output is correct
2 Incorrect 4 ms 1384 KB Output isn't correct
3 Halted 0 ms 0 KB -