Submission #528054

---

Source Code Expand

/*{{{*/
#include <cassert>
#include <cctype>
#include <climits>
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <functional>
#include <bitset>
#include <deque>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <iostream>
#include <string>
#include <sstream>
using namespace std;
typedef int8_t sbyte;
typedef uint8_t byte;
typedef uint16_t ushort;
typedef uint32_t uint;
typedef int64_t i64;
typedef uint64_t u64;
template<class T> static inline T ABS(T x) {return x < 0 ? -x : x;}
template<class T> static inline void MAZ(T &a, const T &b) {if(a < b) a = b;}
template<class T> static inline void MIZ(T &a, const T &b) {if(b < a) a = b;}
/*}}}*/

static int S[81][4];
static int N[3];
static int P[3], Q[3];
static int R[3];
static double DP[101 * 101 * 101];

static inline int myhash(const int *r) {
	return r[0] * 101 * 101 + r[1] * 101 + r[2];
}

static void solve() {
	auto hR = myhash(R);
	if(hR == 0) return;
	auto ret = 1e100;
	for(auto s = 0; s < 81; s++) {
		if(R[S[s][0]] == 0) continue;
		auto ta = 0., tb = 1.;
		auto p = 1, q = 1;
		int r[3] = {R[0], R[1], R[2]};
		auto hr = hR;
		for(auto i = 0; i < 4; i++) {
			auto lvl = S[s][i];
			if(r[lvl] == 0) {
				tb += DP[hr] * p / q;
				break;
			}
			if(Q[lvl] != 0) {
				if(hr != hR) {
					tb += DP[hr] * (p * Q[lvl]) / (q * 100);
				} else {
					ta += p * Q[lvl] / (double)(q * 100);
				}
			}
			r[lvl]--;
			hr = myhash(r);
			p *= P[lvl];
			q *= 100;
			if(i == 2 && lvl == 0 || i == 3) {
				tb += DP[hr] * p / q;
				break;
			}
		}
		MIZ(ret, tb / (1 - ta));
	}
	DP[hR] = ret;
}

static void solve_dfs(int dep) {
	if(dep == 3) {
		solve();
	} else {
		for(auto n = 0; n <= N[dep]; n++) {
			R[dep] = n;
			solve_dfs(dep + 1);
		}
	}
}

static void build() {
	for(auto s = 0; s < 81; s++) {
		auto t = s;
		for(auto i = 4; --i >= 0; ) {
			S[s][i] = t % 3;
			t /= 3;
		}
	}
}

int main() {
	build();
	for(auto i = 0; i < 3; i++) scanf("%d", N + i);
	for(auto i = 0; i < 3; i++) {
		scanf("%d", P + i);
		Q[i] = 100 - P[i];
	}
	solve_dfs(0);
	printf("%.15f\n", DP[myhash(N)]);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:107:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for(auto i = 0; i < 3; i++) scanf("%d", N + i);
                                                ^
./Main.cpp:109:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", P + i);
                     ^

Judge Result