제출 #210322

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
210322		Segtree	Vision Program (IOI19_vision)	C++14	12 / 100	37 ms	1272 KiB

vision

#include "vision.h"
#include<iostream>
#include<algorithm>
#include<vector>
#include<queue>
#include<set>
#include<unordered_set>
#include<unordered_map>
#include<cassert>
#include<stack>
#include<fstream>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> P;
#define rep(i,n) for(int i=0;i<n;i++)
#define all(x) x.begin(),x.end()
#define chmin(a,b) a=min(a,b)
#define chmax(a,b) a=max(a,b)

void construct_network(int H, int W, int K) {
	vector<int> Ns;
	int T=H+W-1;
	for(int s=0;s<T;s++){
		Ns.clear();
		rep(i,H)rep(j,W)if(i+j==s)Ns.push_back(i*W+j);
		add_or(Ns);
	}
	for(int s=0;s<T;s++){
		Ns.clear();
		rep(i,H)rep(j,W)if(i-j+W-1==s)Ns.push_back(i*W+j);
		add_or(Ns);
	}
	for(int s=0;s+K<T;s++){
		Ns.clear();
		Ns={H*W+s,H*W+s+K};
		add_and(Ns);
	}
	int qid;
	for(int s=0;s+K<T;s++){
		Ns.clear();
		Ns={H*W+T+s,H*W+T+s+K};
		qid=add_and(Ns);
	}
	Ns.clear();
	for(int s=H*W+2*T;s<=qid;s++)Ns.push_back(s);
	add_or(Ns);
}

컴파일 시 표준 에러 (stderr) 메시지

vision.cpp: In function 'void construct_network(int, int, int)':
vision.cpp:45:21: warning: 'qid' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(int s=H*W+2*T;s<=qid;s++)Ns.push_back(s);
                    ~^~~~~

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