제출 #910639

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
910639		josanneo22	Teleporters (IOI08_teleporters)	C++17	100 / 100	295 ms	35412 KiB

teleporters

#include<bits/stdc++.h>
using namespace std;
using i64 = long long;

#define L(i,j,k) for(int i=(j);i<=(k);++i)
#define R(i,j,k) for(int i=(j);i>=(k);--i)

namespace fast {
#pragma GCC optimize(Ofast)
#pragma GCC optimization (unroll-loops)
#pragma GCC target(avx,avx2,fma)
#pragma GCC target(sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native)
#pragma GCC optimize(3)
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse")
#pragma GCC optimize("-fgcse-lm")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-ftree-pre")
#pragma GCC optimize("-ftree-vrp")
#pragma GCC optimize("-fpeephole2")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-falign-jumps")
#pragma GCC optimize("-falign-loops")
#pragma GCC optimize("-falign-labels")
#pragma GCC optimize("-fdevirtualize")
#pragma GCC optimize("-fcaller-saves")
#pragma GCC optimize("-fcrossjumping")
#pragma GCC optimize("-fthread-jumps")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-fwhole-program")
#pragma GCC optimize("-freorder-blocks")
#pragma GCC optimize("-fschedule-insns")
#pragma GCC optimize("inline-functions")
#pragma GCC optimize("-ftree-tail-merge")
#pragma GCC optimize("-fschedule-insns2")
#pragma GCC optimize("-fstrict-aliasing")
#pragma GCC optimize("-fstrict-overflow")
#pragma GCC optimize("-falign-functions")
#pragma GCC optimize("-fcse-skip-blocks")
#pragma GCC optimize("-fcse-follow-jumps")
#pragma GCC optimize("-fsched-interblock")
#pragma GCC optimize("-fpartial-inlining")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("-freorder-functions")
#pragma GCC optimize("-findirect-inlining")
#pragma GCC optimize("-fhoist-adjacent-loads")
#pragma GCC optimize("-frerun-cse-after-loop")
#pragma GCC optimize("inline-small-functions")
#pragma GCC optimize("-finline-small-functions")
#pragma GCC optimize("-ftree-switch-conversion")
#pragma GCC optimize("-foptimize-sibling-calls")
#pragma GCC optimize("-fexpensive-optimizations")
#pragma GCC optimize("-funsafe-loop-optimizations")
#pragma GCC optimize("inline-functions-called-once")
#pragma GCC optimize("-fdelete-null-pointer-checks")
}
using namespace fast;

inline string read_string() {
	char ch = getchar(); string st1 = "";
	while (!((ch >= 'A') && (ch <= 'Z'))) ch = getchar();
	while ((ch >= 'A') && (ch <= 'Z'))  st1 += ch, ch = getchar();
	return st1;
}
char buf[1 << 23], * p1 = buf, * p2 = buf;
#define getchar() (p1==p2&&(p2=(p1=buf)+fread(buf,1,1<<21,stdin),p1==p2)?EOF:*p1++)
template<typename T> inline void re(T & x) { x = 0; T f = 1; char ch = getchar();  while (!isdigit(ch)) { if (ch == '-') f = -1; ch = getchar(); } while (isdigit(ch)) { x = (x << 1) + (x << 3) + (ch - 48); ch = getchar(); } x *= f; }
template<typename x, typename... y>void re(x & a, y&... b) { re(a); re(b...); }
template<typename T> inline void ps(T x) { if (x < 0) { putchar('-'); x = -x; } if (x > 9)  ps(x / 10); putchar(x % 10 + '0'); }
template<typename x, typename... y>void ps(x & a, y&... b) { ps(a); putchar(' '); ps(b...); }
#define sp putchar(' ')
#define nl putchar('\n')

struct node {
	int index, pos;
}a[2000005];
inline bool cmp(const node& A, const node& B) { return A.pos < B.pos; }
int nxt[2000005], N, M, sz[2000005], cnt;
bool vis[2000005];
void dfs(int u) {
	if (vis[u]) return;
	vis[u] = true;
	sz[cnt]++;
	if (!vis[nxt[u]]) dfs(nxt[u]);
}
int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr); cout.tie(nullptr);

	re(N, M);
	L(i, 1, N) {
		int l, r; re(l, r);
		a[i].index = i;
		a[i].pos = l;

		a[i + N].index = i + N;
		a[i + N].pos = r;
	}
	sort(a + 1, a + 2 * N + 1, cmp);
	L(i, 1, N * 2) {
		if (a[i].index >= N + 1) {
			int x = a[i].index - N, y = a[i].index;
			a[i].index = y;
			a[i].pos = x;
		}
		else {
			int x = a[i].index, y = N + a[i].index;
			a[i].index = x;
			a[i].pos = y;
		}
	}
	a[0].pos = 0;
	L(i, 1, 2 * N) nxt[a[i - 1].pos] = a[i].index;
	nxt[a[2 * N].pos] = 0;
	L(i, 0, 2 * N) {
		if (!vis[i]) {
			cnt++;
			sz[cnt] = 0;
			dfs(i);
		}
	}
	sort(sz + 2, sz + cnt + 1, greater<int>());
	int ans = sz[1] - 1;
	L(i, 2, cnt) {
		if (M == 0) break;
		M--;
		ans += sz[i];
		ans += 2;
	}
	if (M & 1) { ans++; M--; }
	ans += 2 * M;
	ps(ans);
}

컴파일 시 표준 에러 (stderr) 메시지

teleporters.cpp:10: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   10 | #pragma GCC optimization (unroll-loops)
      | 
teleporters.cpp:9:22: warning: '#pragma GCC optimize' is not a string or number [-Wpragmas]
    9 | #pragma GCC optimize(Ofast)
      |                      ^~~~~
teleporters.cpp:11:20: warning: '#pragma GCC option' is not a string [-Wpragmas]
   11 | #pragma GCC target(avx,avx2,fma)
      |                    ^~~
teleporters.cpp:12:20: warning: '#pragma GCC option' is not a string [-Wpragmas]
   12 | #pragma GCC target(sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native)
      |                    ^~~
teleporters.cpp:32:39: warning: bad option '-fwhole-program' to pragma 'optimize' [-Wpragmas]
   32 | #pragma GCC optimize("-fwhole-program")
      |                                       ^
teleporters.cpp:39:41: warning: bad option '-fstrict-overflow' to pragma 'optimize' [-Wpragmas]
   39 | #pragma GCC optimize("-fstrict-overflow")
      |                                         ^
teleporters.cpp:41:41: warning: bad option '-fcse-skip-blocks' to pragma 'optimize' [-Wpragmas]
   41 | #pragma GCC optimize("-fcse-skip-blocks")
      |                                         ^
teleporters.cpp:55:51: warning: bad option '-funsafe-loop-optimizations' to pragma 'optimize' [-Wpragmas]
   55 | #pragma GCC optimize("-funsafe-loop-optimizations")
      |                                                   ^
teleporters.cpp:61:27: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   61 | inline string read_string() {
      |                           ^
teleporters.cpp:61:27: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
teleporters.cpp:61:27: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
teleporters.cpp:61:27: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
teleporters.cpp:69:42: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   69 | template<typename T> inline void re(T & x) { x = 0; T f = 1; char ch = getchar();  while (!isdigit(ch)) { if (ch == '-') f = -1; ch = getchar(); } while (isdigit(ch)) { x = (x << 1) + (x << 3) + (ch - 48); ch = getchar(); } x *= f; }
      |                                          ^
teleporters.cpp:69:42: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
teleporters.cpp:69:42: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
teleporters.cpp:69:42: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
teleporters.cpp:70:58: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   70 | template<typename x, typename... y>void re(x & a, y&... b) { re(a); re(b...); }
      |                                                          ^
teleporters.cpp:70:58: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
teleporters.cpp:70:58: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
teleporters.cpp:70:58: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
teleporters.cpp:71:40: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   71 | template<typename T> inline void ps(T x) { if (x < 0) { putchar('-'); x = -x; } if (x > 9)  ps(x / 10); putchar(x % 10 + '0'); }
      |                                        ^
teleporters.cpp:71:40: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
teleporters.cpp:71:40: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
teleporters.cpp:71:40: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
teleporters.cpp:72:58: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   72 | template<typename x, typename... y>void ps(x & a, y&... b) { ps(a); putchar(' '); ps(b...); }
      |                                                          ^
teleporters.cpp:72:58: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
teleporters.cpp:72:58: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
teleporters.cpp:72:58: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
teleporters.cpp:79:45: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   79 | inline bool cmp(const node& A, const node& B) { return A.pos < B.pos; }
      |                                             ^
teleporters.cpp:79:45: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
teleporters.cpp:79:45: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
teleporters.cpp:79:45: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
teleporters.cpp:82:15: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   82 | void dfs(int u) {
      |               ^
teleporters.cpp:82:15: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
teleporters.cpp:82:15: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
teleporters.cpp:82:15: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
teleporters.cpp:88:10: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   88 | int main() {
      |          ^
teleporters.cpp:88:10: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
teleporters.cpp:88:10: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
teleporters.cpp:88:10: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]

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