제출 #95438

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
95438		Retro3014	방벽 (JOI15_walls)	C++17	10 / 100	35 ms	3304 KiB

walls

#include <iostream>
#include <algorithm>
#include <vector>
#include <stdio.h>

typedef long long ll;
using namespace std;

int N, M;
struct S{
	int a, b;
};
vector<S> v;
vector<int> P;


void solve1(){
	ll ans = 0;
	int x = v[0].a, y = v[0].b;
	for(int i=0; i<P.size(); i++){
		int now = P[i];
		if(y<now){
			ans += (ll)now-y;
			x += now-y;
			y = now;
		}else if(x>now){
			ans += (ll)x-now;
			y -= x-now;
			x = now;
		}
	}
	printf("%lld", ans);
}

void solve2(){

}

void solve3(){

}

int main(){
	scanf("%d%d", &N, &M);
	for(int i=0; i<N; i++){
		S tmp;
		scanf("%d%d", &tmp.a, &tmp.b); v.push_back(tmp);
	}
	for(int i=0; i<M; i++){
		int x;
		scanf("%d", &x); P.push_back(x);
	}
	if(N==1){
		solve1();
	}
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

walls.cpp: In function 'void solve1()':
walls.cpp:20:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<P.size(); i++){
               ~^~~~~~~~~
walls.cpp: In function 'int main()':
walls.cpp:44:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &M);
  ~~~~~^~~~~~~~~~~~~~~~
walls.cpp:47:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &tmp.a, &tmp.b); v.push_back(tmp);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
walls.cpp:51:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x); P.push_back(x);
   ~~~~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 45
• Subtask 3: 0 / 45