【HDOJ】1080 Human Gene Functions

DP。wa了一下午，原来是把mmax写在外层循环了。最近事情太多了，刷题根本没状态。

#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <map>
#include <iostream>
using namespace std;

#define MAXN 205
#define INF -99999
#define TOKEN '-'

char r[MAXN], l[MAXN];
int dp[MAXN][MAXN];
int t, n, rn, ln;
map<char, int> m;

int mmap[5][5] = {
    {5, -1, -2, -1, -3},
    {-1, 5, -3, -2, -4},
    {-2, -3, 5, -2, -2},
    {-1, -2, -2, 5, -1},
    {-3, -4, -2, -1, 0}
};

int getmax(int a, int b) {
    return a>b ? a:b;
}

void init() {
    m['A'] = 0;
    m['C'] = 1;
    m['G'] = 2;
    m['T'] = 3;
    m[TOKEN] = 4;
}

int main() {
    int i, j, k, tmp, mmax;
    init();

#ifndef ONLINE_JUDGE
    freopen("data.in", "r", stdin);
    freopen("data.out", "w", stdout);
#endif

    scanf("%d", &t);
    while (t--) {
        scanf("%d %s", &rn, r);
        scanf("%d %s", &ln, l);
        dp[rn][ln] = 0;
        for (i=rn-1; i>=0; --i) {
            dp[i][ln] = dp[i+1][ln] + mmap[m[r[i]]][4];
        }
        for (j=ln-1; j>=0; --j) {
            dp[rn][j] = dp[rn][j+1] + mmap[4][m[l[j]]];
        }
        for (i=rn-1; i>=0; --i) {
            for (j=ln-1; j>=0; --j) {
                mmax = INF;
                if (r[i] == l[j])
                    mmax = getmax(mmax, mmap[m[r[i]]][m[l[j]]]+dp[i+1][j+1]);
                else {
                    mmax = getmax(mmax, mmap[m[r[i]]][4]+dp[i+1][j]);
                    mmax = getmax(mmax, mmap[m[l[j]]][4]+dp[i][j+1]);
                    mmax = getmax(mmax, mmap[m[r[i]]][m[l[j]]]+dp[i+1][j+1]);
                }
                dp[i][j] = mmax;
            }
        }
        printf("%d
", dp[0][0]);
    }

    return 0;
}