結果
| 問題 | No.5020 Averaging |
| ユーザー |
👑  ygussany
|
| 提出日時 | 2024-02-25 13:40:10 |
| 言語 | C (gcc 13.3.0) |
| 結果 |
AC
|
| 実行時間 | 716 ms / 1,000 ms |
| コード長 | 5,898 bytes |
| コンパイル時間 | 356 ms |
| コンパイル使用メモリ | 37,120 KB |
| 実行使用メモリ | 6,676 KB |
| スコア | 28,960,450 |
| 最終ジャッジ日時 | 2024-02-25 13:40:49 |
| 合計ジャッジ時間 | 37,838 ms |
|
ジャッジサーバーID （参考情報） |
judge15 / judge11 |
| 純コード判定しない問題か言語 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 50 |
ソースコード
#include <stdio.h>#include <stdlib.h>#include <math.h>#include <sys/time.h>struct timeval tt;double beg, cur;#define MT_N 624#define MT_M 397#define MT_MATRIX_A 0x9908b0dfUL#define MT_UPPER_MASK 0x80000000UL#define MT_LOWER_MASK 0x7fffffffULstatic unsigned int mt[MT_N];static int mti = MT_N + 1;void init_genrand(unsigned int s){mt[0] = s & 0xffffffffUL;for (mti = 1; mti < MT_N; mti++) {mt[mti] = (1812433253UL * (mt[mti-1] ^ (mt[mti-1] >> 30)) + mti);mt[mti] &= 0xffffffffUL;}}unsigned int genrand(){unsigned int y;static unsigned int mag01[2] = {0x0UL, MT_MATRIX_A};if (mti >= MT_N) {int kk;if (mti == MT_N + 1) init_genrand(5489UL);for (kk = 0; kk < MT_N - MT_M; kk++) {y = (mt[kk] & MT_UPPER_MASK) | (mt[kk+1] & MT_LOWER_MASK);mt[kk] = mt[kk+MT_M] ^ (y >> 1) ^ mag01[y&0x1UL];}for (; kk < MT_N - 1; kk++) {y = (mt[kk] & MT_UPPER_MASK) | (mt[kk+1] & MT_LOWER_MASK);mt[kk] = mt[kk+(MT_M-MT_N)] ^ (y >> 1) ^ mag01[y&0x1UL];}y = (mt[MT_N-1] & MT_UPPER_MASK) | (mt[0] & MT_LOWER_MASK);mt[MT_N-1] = mt[MT_M-1] ^ (y >> 1) ^ mag01[y&0x1UL];mti = 0;}y = mt[mti++];y ^= (y >> 11);y ^= (y << 7) & 0x9d2c5680UL;y ^= (y << 15) & 0xefc60000UL;y ^= (y >> 18);return y;}void shuffle_permutation(int N, int p[], int K){int i, j;while (K--) {i = genrand() % N + 1;j = genrand() % N + 1;if (i != j) {p[i] ^= p[j];p[j] ^= p[i];p[i] ^= p[j];}}}void chmax(long long *a, long long b){if (*a < b) *a = b;}const long long THR = 500000000000000000LL;int score(int N, long long A[], long long B[]){static long long tmp;tmp = llabs(A[1] - THR);chmax(&tmp, llabs(B[1] - THR));if (tmp == 0) return 2000050;return (int)(2000000 - 100000 * log10(tmp + 1.0));}long long score_random_playout(int N, long long AA[], long long BB[], int K, int L){static int i, j, k;static long long A[46], B[46], ans, tmp;ans = 0;while (L--) {for (i = 1; i <= N; i++) {A[i] = AA[i];B[i] = BB[i];}for (k = 1; k <= K; k++) {do {i = genrand() % N + 1;j = genrand() % N + 1;} while (i == j);tmp = (A[i] + A[j]) / 2;A[i] = tmp;A[j] = tmp;tmp = (B[i] + B[j]) / 2;B[i] = tmp;B[j] = tmp;}ans += score(N, A, B);}return ans;}long long score_greedy_playout(int N, long long AA[], long long BB[], int K, int L){static int i, j, k, argmax;static long long A[46], B[46], ans, tmp, tmpp, max;ans = 0;while (L--) {for (i = 1; i <= N; i++) {A[i] = AA[i];B[i] = BB[i];}for (k = 1; k <= K; k++) {for (j = 2, max = 0; j <= N; j++) {tmp = llabs(A[1] - THR);chmax(&tmp, llabs(B[1] - THR));tmpp = llabs((A[1] + A[j]) / 2 - THR);chmax(&tmpp, llabs((B[1] + B[j]) / 2 - THR));tmp -= tmpp;if (max < tmp) {max = tmp;argmax = j;}}if (max == 0) {do {i = genrand() % N + 1;j = genrand() % N + 1;} while (i == j);} else {i = 1;j = argmax;}tmp = (A[i] + A[j]) / 2;A[i] = tmp;A[j] = tmp;tmp = (B[i] + B[j]) / 2;B[i] = tmp;B[j] = tmp;}ans += score(N, A, B);}return ans;}int random_playout_based_greedy(int N, long long AA[], long long BB[], int K, int move[][2]){static int i, j, k;static long long A[46], B[46], tmp, tmpp[2][2], max;for (i = 1; i <= N; i++) {A[i] = AA[i];B[i] = BB[i];}for (k = 1; k <= K; k++) {if (A[i] == THR && B[i] == THR) return -(k - 1);for (i = 1, max = 0; i <= N; i++) {for (j = i + 1; j <= N; j++) {tmpp[0][0] = A[i];tmpp[0][1] = A[j];tmpp[1][0] = B[i];tmpp[1][1] = B[j];tmp = (A[i] + A[j]) / 2;A[i] = tmp;A[j] = tmp;tmp = (B[i] + B[j]) / 2;B[i] = tmp;B[j] = tmp;tmp = score_random_playout(N, A, B, K - k, 40);if (max < tmp) {max = tmp;move[k][0] = i;move[k][1] = j;}A[i] = tmpp[0][0];A[j] = tmpp[0][1];B[i] = tmpp[1][0];B[j] = tmpp[1][1];}}i = move[k][0];j = move[k][1];tmp = (A[i] + A[j]) / 2;A[i] = tmp;A[j] = tmp;tmp = (B[i] + B[j]) / 2;B[i] = tmp;B[j] = tmp;}return score(N, A, B);}int greedy_playout_based_greedy(int N, long long AA[], long long BB[], int K, int move[][2]){static int i, j, k;static long long A[46], B[46], tmp, tmpp[2][2], max;for (i = 1; i <= N; i++) {A[i] = AA[i];B[i] = BB[i];}for (k = 1; k <= K; k++) {if (A[i] == THR && B[i] == THR) return -(k - 1);for (i = 1, max = 0; i <= N; i++) {for (j = i + 1; j <= N; j++) {tmpp[0][0] = A[i];tmpp[0][1] = A[j];tmpp[1][0] = B[i];tmpp[1][1] = B[j];tmp = (A[i] + A[j]) / 2;A[i] = tmp;A[j] = tmp;tmp = (B[i] + B[j]) / 2;B[i] = tmp;B[j] = tmp;tmp = score_greedy_playout(N, A, B, K - k, 4);if (max < tmp) {max = tmp;move[k][0] = i;move[k][1] = j;}A[i] = tmpp[0][0];A[j] = tmpp[0][1];B[i] = tmpp[1][0];B[j] = tmpp[1][1];}}i = move[k][0];j = move[k][1];tmp = (A[i] + A[j]) / 2;A[i] = tmp;A[j] = tmp;tmp = (B[i] + B[j]) / 2;B[i] = tmp;B[j] = tmp;}return score(N, A, B);}int main(){gettimeofday(&tt, NULL);beg = tt.tv_sec + (double)tt.tv_usec / 1000000;int i, N;long long A[46], B[46];scanf("%d", &N);for (i = 1; i <= N; i++) scanf("%lld %lld", &(A[i]), &(B[i]));int k, move[51][2];// k = random_playout_based_greedy(N, A, B, 50, move);k = greedy_playout_based_greedy(N, A, B, 50, move);// printf("%d\n", k);if (k <= 0) k *= -1;else k = 50;printf("%d\n", k);for (i = 1; i <= k; i++) printf("%d %d\n", move[i][0], move[i][1]);fflush(stdout);return 0;}