제출 #127357

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
127357		E869120	DEL13 (info1cup18_del13)	C++14	15 / 100	19 ms	2220 KiB

del13

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
#pragma warning (disable: 4996)

bool forced[1 << 18];
int col[1 << 18], cl[1 << 18], cr[1 << 18];

vector<int> solve(int N, vector<int>A) {
	if ((N - (int)A.size()) % 2 == 1) return vector<int>{-1};
	if (A.size() == 0) return vector<int>{-1};

	for (int i = 0; i <= N + 1; i++) {
		col[i] = -1; cl[i] = (1 << 30); cr[i] = -(1 << 30); forced[i] = false;
	}

	for (int i = 0; i < A.size(); i++) {
		if ((i + 1) % 2 == A[i] % 2) {
			if (col[A[i]] >= 0) return vector<int>{-1};
			else col[A[i]] = i + 1;
		}
		else {
			if (col[A[i] - 1] >= 0 || col[A[i]] >= 0) return vector<int>{-1};
			else { col[A[i] - 1] = i + 1; col[A[i]] = i + 1; col[A[i] + 1] = i + 1; }
		}
	}

	for (int i = 1; i <= N - 1; i++) {
		if (col[i] == -1 || col[i + 1] == -1) continue;

		if (col[i] != col[i + 1]) {
			if (col[i] % 2 == A[col[i] - 1] % 2) forced[col[i]] = true;
			if (col[i + 1] % 2 == A[col[i + 1] - 1] % 2) forced[col[i + 1]] = true;
		}
	}
	if (A[0] == 1) forced[1] = true;
	if (A[A.size() - 1] == N) forced[A.size()] = true;

	for (int i = 1; i <= N; i++) {
		if (col[i] == -1) continue;
		cl[col[i]] = min(cl[col[i]], i);
		cr[col[i]] = max(cr[col[i]], i);
	}
	for (int i = 1; i < cl[1]; i++) col[i] = 1;
	for (int i = cr[A.size()] + 1; i <= N; i++) col[i] = A.size();

	for (int i = 1; i <= (int)A.size() - 1; i++) {
		int el = cr[i] + 1, er = cl[i + 1] - 1;
		if (forced[i] == true) { for (int j = el; j <= er; j++) col[j] = i + 1; }
		else if (forced[i + 1] == true) { for (int j = el; j <= er; j++) col[j] = i; }
		else {
			for (int j = el; j <= (el + er) / 2; j++) col[j] = i;
			for (int j = (el + er) / 2 + 1; j <= er; j++) col[j] = i + 1;
		}
	}

	for (int i = 1; i <= N; i++) {
		cl[col[i]] = min(cl[col[i]], i);
		cr[col[i]] = max(cr[col[i]], i);
	}

	vector<int>ans;
	for (int i = 1; i <= A.size(); i++) {
		if (cl[i] == cr[i]) continue;
		int lefthand = A[i - 1] - cl[i], righthand = cr[i] - A[i - 1];

		if (lefthand == 0 || righthand == 0) return vector<int>{-1};
		if ((cr[i] - cl[i]) % 2 == 1) return vector<int>{-1};

		if (lefthand <= righthand) {
			int mid = cr[i] - (righthand - lefthand) / 2;
			for (int j = 0; j < (righthand - lefthand) / 2; j++) ans.push_back(mid);
			for (int j = 0; j < lefthand; j++) ans.push_back(A[i - 1]);
		}
		if (lefthand > righthand) {
			int mid = cl[i] + (lefthand - righthand) / 2;
			for (int j = 0; j < (lefthand - righthand) / 2; j++) ans.push_back(mid);
			for (int j = 0; j < righthand; j++) ans.push_back(A[i - 1]);
		}
	}
	return ans;
}

int main() {
	int T; scanf("%d", &T);
	for (int i = 1; i <= T; i++) {
		int N1, V1; vector<int>A1;
		scanf("%d%d", &N1, &V1);
		for (int j = 1; j <= V1; j++) { int p; scanf("%d", &p); A1.push_back(p); }

		vector<int>L = solve(N1, A1);
		if (L == vector<int>{-1}) printf("-1\n");
		else {
			printf("%d\n", (int)L.size());
			for (int j = 0; j < L.size(); j++) { if (j) printf(" "); printf("%d", L[j]); }
			printf("\n");
		}
	}
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

del13.cpp:5:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning (disable: 4996)
 
del13.cpp: In function 'std::vector<int> solve(int, std::vector<int>)':
del13.cpp:18:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < A.size(); i++) {
                  ~~^~~~~~~~~~
del13.cpp:64:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 1; i <= A.size(); i++) {
                  ~~^~~~~~~~~~~
del13.cpp: In function 'int main()':
del13.cpp:96:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int j = 0; j < L.size(); j++) { if (j) printf(" "); printf("%d", L[j]); }
                    ~~^~~~~~~~~~
del13.cpp:86:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  int T; scanf("%d", &T);
         ~~~~~^~~~~~~~~~
del13.cpp:89:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &N1, &V1);
   ~~~~~^~~~~~~~~~~~~~~~~~
del13.cpp:90:47: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for (int j = 1; j <= V1; j++) { int p; scanf("%d", &p); A1.push_back(p); }
                                          ~~~~~^~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 15
• Subtask 3: 15 / 15
• Subtask 4: 0 / 25
• Subtask 5: 0 / 30