oj.uz

Submission #104943

# Submission time Handle Problem Language Result Execution time Memory
104943 2019-04-09T21:37:47 Z tincamatei Growing Vegetable is Fun 3 (JOI19_ho_t3) C++14
15 / 100
 135 ms 4228 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 400;
const int INF = 1000000000;

int dp[2][1+MAX_N][1+MAX_N][3];
vector<int> pos[3];

char str[1+MAX_N];

char getchar(FILE *fin) {
	char ch = fgetc(fin);
	while(!isalpha(ch))
		ch = fgetc(fin);
	return ch;
}

void initDp(int p) {
	for(int i = 0; i <= MAX_N; ++i)
		for(int j = 0; j <= MAX_N; ++j)
			for(int k = 0; k < 3; ++k)
				dp[p][i][j][k] = INF;
}

int main() {
#ifdef HOME
	FILE *fin = fopen("input.in", "r");
	FILE *fout = fopen("output.out", "w");
#else
	FILE *fin = stdin;
	FILE *fout = stdout;
#endif
	
	int n;
	fscanf(fin, "%d", &n);

	for(int i = 1; i <= n; ++i) {
		str[i] = getchar(fin);
		if(str[i] == 'R')
			str[i] = 0;
		else if(str[i] == 'G')
			str[i] = 1;
		else
			str[i] = 2;
		
		pos[str[i]].push_back(i);
	}
	
	initDp(0);
	dp[0][0][0][0] = dp[0][0][0][1] = dp[0][0][0][2] = 0;
	for(int i = 1; i <= n; ++i) {
		int p = i % 2;
		int ind[3];
		initDp(p);
		
		for(ind[0] = 0; ind[0] <= pos[0].size(); ++ind[0])
			for(ind[1] = 0; ind[1] <= pos[1].size(); ++ind[1]) {
				ind[2] = i - ind[0] - ind[1];
				if(0 <= ind[2] && ind[2] <= pos[2].size()) {
					for(int oldblock = 0; oldblock < 3; ++oldblock)
						for(int newblock = 0; newblock < 3; ++newblock) {
							if(oldblock != newblock) {
								int indcp[3];
								for(int x = 0; x < 3; ++x)
									indcp[x] = ind[x];
								
								indcp[newblock]--;
								if(indcp[newblock] >= 0) {
									dp[p][ind[0]][ind[1]][newblock] = min(dp[p][ind[0]][ind[1]][newblock],
								  	                                    dp[1-p][indcp[0]][indcp[1]][oldblock] + abs(i - pos[newblock][indcp[newblock]]));
								}
							}
						}
				}
			}
	}
	
	int rez = min(min(dp[n % 2][pos[0].size()][pos[1].size()][0],
	                  dp[n % 2][pos[0].size()][pos[1].size()][1]),
	                  dp[n % 2][pos[0].size()][pos[1].size()][2]);
	
	if(rez == INF)
		fprintf(fout, "-1");
	else
		fprintf(fout, "%d", rez / 2);

	fclose(fin);
	fclose(fout);
	return 0;
}

Compilation message

joi2019_ho_t3.cpp: In function 'int main()':
joi2019_ho_t3.cpp:48:13: warning: array subscript has type 'char' [-Wchar-subscripts]
   pos[str[i]].push_back(i);
             ^
joi2019_ho_t3.cpp:58:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(ind[0] = 0; ind[0] <= pos[0].size(); ++ind[0])
                   ~~~~~~~^~~~~~~~~~~~~~~~
joi2019_ho_t3.cpp:59:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(ind[1] = 0; ind[1] <= pos[1].size(); ++ind[1]) {
                    ~~~~~~~^~~~~~~~~~~~~~~~
joi2019_ho_t3.cpp:61:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(0 <= ind[2] && ind[2] <= pos[2].size()) {
                       ~~~~~~~^~~~~~~~~~~~~~~~
joi2019_ho_t3.cpp:37:8: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  fscanf(fin, "%d", &n);
  ~~~~~~^~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4096 KB Output is correct
2 Correct 7 ms 4096 KB Output is correct
3 Correct 5 ms 4096 KB Output is correct
4 Correct 7 ms 4096 KB Output is correct
5 Correct 8 ms 4096 KB Output is correct
6 Correct 7 ms 4096 KB Output is correct
7 Correct 7 ms 4096 KB Output is correct
8 Correct 7 ms 4096 KB Output is correct
9 Correct 8 ms 4140 KB Output is correct
10 Correct 9 ms 4108 KB Output is correct
11 Incorrect 8 ms 4096 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #2
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4096 KB Output is correct
2 Correct 7 ms 4096 KB Output is correct
3 Correct 5 ms 4096 KB Output is correct
4 Correct 7 ms 4096 KB Output is correct
5 Correct 8 ms 4096 KB Output is correct
6 Correct 7 ms 4096 KB Output is correct
7 Correct 7 ms 4096 KB Output is correct
8 Correct 7 ms 4096 KB Output is correct
9 Correct 8 ms 4140 KB Output is correct
10 Correct 9 ms 4108 KB Output is correct
11 Incorrect 8 ms 4096 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 4096 KB Output is correct
2 Correct 104 ms 4136 KB Output is correct
3 Correct 105 ms 4132 KB Output is correct
4 Correct 104 ms 4096 KB Output is correct
5 Correct 116 ms 4216 KB Output is correct
6 Correct 117 ms 4132 KB Output is correct
7 Correct 106 ms 4096 KB Output is correct
8 Correct 111 ms 4096 KB Output is correct
9 Correct 118 ms 4140 KB Output is correct
10 Correct 116 ms 4216 KB Output is correct
11 Correct 135 ms 4096 KB Output is correct
12 Correct 54 ms 4172 KB Output is correct
13 Correct 73 ms 4136 KB Output is correct
14 Correct 96 ms 4132 KB Output is correct
15 Correct 125 ms 4228 KB Output is correct
16 Correct 119 ms 4136 KB Output is correct

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4096 KB Output is correct
2 Correct 7 ms 4096 KB Output is correct
3 Correct 5 ms 4096 KB Output is correct
4 Correct 7 ms 4096 KB Output is correct
5 Correct 8 ms 4096 KB Output is correct
6 Correct 7 ms 4096 KB Output is correct
7 Correct 7 ms 4096 KB Output is correct
8 Correct 7 ms 4096 KB Output is correct
9 Correct 8 ms 4140 KB Output is correct
10 Correct 9 ms 4108 KB Output is correct
11 Incorrect 8 ms 4096 KB Output isn't correct
12 Halted 0 ms 0 KB -