제출 #279697

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
279697		patrikpavic2	Pairs (IOI07_pairs)	C++17	60 / 100	50 ms	2156 KiB

pairs

#include <cstdio>
#include <cstring>
#include <vector>
#include <algorithm>

#define X first
#define Y second
#define PB push_back

using namespace std;

typedef long long ll;
typedef pair < int, int > pii;

const int N = 3e5 + 500;
const int OFF = 1e5 + 500;
const int M = 80;

int loga[N], B, n, m, D;

inline int trans(int x){
	return max(min(x + OFF, N - 1), 0);
}

void add(int x, int y){
	x = trans(x);
	for(; x < N ; x += x & -x)
		loga[x] += y;
}

int query(int x){
	int ret = 0;
	x = trans(x);
	for(; x ; x -= x & -x)
		ret += loga[x];
	return ret;
}


int main(){
	scanf("%d%d%d%d", &B, &n, &D, &m);
	if(B == 1){
		vector < int > v;
		for(int i = 0;i < n;i++){
			int x; scanf("%d", &x);
			v.PB(x);
		}
		sort(v.begin(), v.end());
		int l = 0, r = 0, cur = 0;
		ll sol = 0;
		for(int i = 0;i < n;i++){
			while(v[i] - v[l] > D)
				cur--, l++;
			while(r < n && v[r] - v[i] <= D)
				cur++, r++;
			sol += cur;
		}
		printf("%lld\n", (sol - n) / 2);
	}
	if(B == 2){
		vector < pii > v;
		for(int i = 0;i < n;i++){
			int x, y; scanf("%d%d", &x, &y);
			v.PB({x + y, x - y});
		}
		sort(v.begin(), v.end());
		int l = 0, r = 0;
		ll sol = 0;
		for(int i = 0;i < n;i++){
			while(v[i].X - v[l].X > D)
				add(v[l++].Y, -1);
			while(r < n && v[r].X - v[i].X <= D)
				add(v[r++].Y, 1);
			sol += query(v[i].Y + D) - query(v[i].Y - D - 1);
		}
		printf("%lld\n", (sol - n) / 2);
	}
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

pairs.cpp: In function 'int main()':
pairs.cpp:41:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   41 |  scanf("%d%d%d%d", &B, &n, &D, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
pairs.cpp:45:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   45 |    int x; scanf("%d", &x);
      |           ~~~~~^~~~~~~~~~
pairs.cpp:63:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   63 |    int x, y; scanf("%d%d", &x, &y);
      |              ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 6 / 6
• Subtask 3: 6 / 6
• Subtask 4: 6 / 6
• Subtask 5: 6 / 6
• Subtask 6: 7 / 7
• Subtask 7: 7 / 7
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• Subtask 10: 0 / 10
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• Subtask 13: 0 / 10