제출 #42570

#제출 시각아이디문제언어결과실행 시간메모리
42570nonocut섬 항해 (CEOI13_adriatic)C++14
0 / 100
2051 ms262144 KiB
#include<bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define X first
#define Y second
const int maxv = 2500;
const int maxn = 250000 + 5;
struct node {
	int x,y,id;
};
int n;
node p[maxn];
int pos[maxv+5];
vector<pii> way[maxn];
bool cmp(node a, node b) {
	if(a.x!=b.x) return a.x<b.x;
	return a.y>b.y;
}
int main() {
	scanf("%d",&n);
	for(int i=1;i<=n;i++) scanf("%d%d",&p[i].x,&p[i].y), p[i].id = i;
	sort(&p[1],&p[n+1],cmp);
	for(int i=1;i<=n;i++) {
        int cur = 0;
        for(int y=p[i].y-1;y>=1;y--) {
            if(pos[y]>cur) {
                cur = pos[y];
                way[p[i].id].push_back({p[pos[y]].id,1});
                way[p[pos[y]].id].push_back({p[i].id,0});
            }
        }
        pos[p[i].y] = i;
	}
}

컴파일 시 표준 에러 (stderr) 메시지

adriatic.cpp: In function 'int main()':
adriatic.cpp:20:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
adriatic.cpp:21:66: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=n;i++) scanf("%d%d",&p[i].x,&p[i].y), p[i].id = i;
                                                                  ^
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