제출 #291417

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
291417		abyyskit	장난감 기차 (IOI17_train)	C++14	15 / 100	2067 ms	1152 KiB

train

#include "train.h"
#include<bits/stdc++.h>
using namespace std;
#define FOR(i, x, y) for(int i = x; i < y; ++i)
#define pb push_back


struct node{
	vector<int> e;
	bool charge = false;
	bool A = false;
	bool vis = false;
	int time = INT_MAX;
};

vector<node> g;

vector<int> subtask1(){
	vector<int> ans(g.size(), 0);
	for(int i = g.size() - 1; i >= 0; --i){
		if (g[i].A){
			ans[i] = 0;
		}
		else{
			ans[i] = 1;
		}
		FOR(j, 0, g[i].e.size()){
			int nex = g[i].e[j];
		//	cout << "nex: " << nex << "\n";
			if (g[i].A){
				if (g[i].charge && nex == i){
					ans[i] = 1;
					break;
				}
				if (nex != i){
					ans[i] = max(ans[i], ans[i + 1]);
				}
			}
			else{
				if (nex == i){
					if (!g[i].charge){
						ans[i] = 0;
						break;
					}
				}
				else{
					ans[i] = min(ans[i], ans[i + 1]);
				}
			}
		}
	}
	return ans;
}

int s2dfs(int start, int prev){
	g[start].vis = true;
	if (g[start].charge){
		prev = g[start].time;
	}
	int ans;
	if (g[start].A){
		ans = 0;
	}
	else{
		ans = 1;
	}
	FOR(i, 0, g[start].e.size()){
		int nex = g[start].e[i];
		if (!g[nex].vis){
			g[nex].time = g[start].time + 1;
			int tmp = s2dfs(nex, prev);
			if (g[start].A){
				ans = max(ans, tmp);
			}
			else{
				ans = min(ans, tmp);
			}
		}
		else{
			if (g[nex].time <= prev){
				if (g[start].A){
					ans = 1;
				}	
			}
			else{
				if (!g[start].A){
					ans = 0;
				}
			}
		}
	}
	g[start].time = INT_MAX;
	g[start].vis = false;
	return ans;
}


vector<int> subtask2(){
	vector<int> ans(g.size(), 0);
	FOR(i, 0, g.size()){
		g[i].time = 0;
		ans[i] = s2dfs(i, -1);
		g[i].time = INT_MAX;
	}
	return ans;
}

vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v){
	g.resize(a.size());
	FOR(i, 0, u.size()){
		g[u[i]].e.pb(v[i]);
	}
//	cout << "here\n";
	FOR(i, 0, a.size()){
		if (a[i] == 1){
			g[i].A = true;
		}
		if (r[i] == 1){
			g[i].charge = true;
		}
	}
//	cout << "here2" << "\n";
	return subtask2();
}

컴파일 시 표준 에러 (stderr) 메시지

train.cpp: In function 'std::vector<int> subtask1()':
train.cpp:4:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define FOR(i, x, y) for(int i = x; i < y; ++i)
......
   27 |   FOR(j, 0, g[i].e.size()){
      |       ~~~~~~~~~~~~~~~~~~~              
train.cpp:27:3: note: in expansion of macro 'FOR'
   27 |   FOR(j, 0, g[i].e.size()){
      |   ^~~
train.cpp: In function 'int s2dfs(int, int)':
train.cpp:4:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define FOR(i, x, y) for(int i = x; i < y; ++i)
......
   67 |  FOR(i, 0, g[start].e.size()){
      |      ~~~~~~~~~~~~~~~~~~~~~~~           
train.cpp:67:2: note: in expansion of macro 'FOR'
   67 |  FOR(i, 0, g[start].e.size()){
      |  ^~~
train.cpp: In function 'std::vector<int> subtask2()':
train.cpp:4:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define FOR(i, x, y) for(int i = x; i < y; ++i)
......
  100 |  FOR(i, 0, g.size()){
      |      ~~~~~~~~~~~~~~                    
train.cpp:100:2: note: in expansion of macro 'FOR'
  100 |  FOR(i, 0, g.size()){
      |  ^~~
train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:4:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define FOR(i, x, y) for(int i = x; i < y; ++i)
......
  110 |  FOR(i, 0, u.size()){
      |      ~~~~~~~~~~~~~~                    
train.cpp:110:2: note: in expansion of macro 'FOR'
  110 |  FOR(i, 0, u.size()){
      |  ^~~
train.cpp:4:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define FOR(i, x, y) for(int i = x; i < y; ++i)
......
  114 |  FOR(i, 0, a.size()){
      |      ~~~~~~~~~~~~~~                    
train.cpp:114:2: note: in expansion of macro 'FOR'
  114 |  FOR(i, 0, a.size()){
      |  ^~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 11
• Subtask 4: 0 / 11
• Subtask 5: 0 / 12
• Subtask 6: 0 / 51