func_code_string: #include <bits/stdc++.h>   long long MAX(long long x, long long y) { return (x > y) ? x : y; }   long long MIN(long long x, long long y) { return (x < y) ? x : y; }   const int MAXN = 123;   const int MAXNM = 223;   const int MAXK = 7;   const int inf = 0x3f3f3f3f;   using namespace std;   inline int Read() {     register int x = 0;     bool flag = false;     register char ch = getchar();     while (ch <  0  || ch >  9 ) {       if (ch ==  - ) flag = true;       ch = getchar();     }     if (flag) {       while ( 0  <= ch && ch <=  9 ) {         x = x * 10 - ch +  0 ;         ch = getchar();       }     } else {       while ( 0  <= ch && ch <=  9 ) {         x = x * 10 + ch -  0 ;         ch = getchar();       }     }     return x;   }   int N, M, K;   int cg(int x, int y) { return (x - 1) * M + y; }   pair<int, int> split(int z) {     int y = (z - 1) % M + 1;     return make_pair((z - y) / M + 1, y);   }   int dirx[4] = {1, 0, -1, 0};   int diry[4] = {0, 1, 0, -1};   int trans(int z, int dir) {     pair<int, int> p = split(z);     p = make_pair(p.first + dirx[dir], p.second + diry[dir]);     if (1 <= p.first && p.first <= N && 1 <= p.second && p.second <= M)       return cg(p.first, p.second);     else       return -1;   }   int a[MAXNM];   int f[MAXNM][(1 << MAXK) - 1];   vector<pair<int, int> > frm[MAXNM][(1 << MAXK) - 1];   int ele[MAXK];   queue<int> q;   bool inq[MAXNM];   void spfa(int s) {     while (!q.empty()) {       int hd = q.front();       q.pop();       inq[hd] = false;       for (int i = 0; i <= 3; i++) {         int v = trans(hd, i);         if (~v) {           if (f[v][s] > f[hd][s] + a[v]) {             f[v][s] = f[hd][s] + a[v];             frm[v][s].clear();             frm[v][s].push_back(make_pair(hd, s));             if (!inq[v]) {               q.push(v);               inq[v] = true;             }           }         }       }     }   }   char mp[MAXN][MAXN];   void print(int i, int s) {     pair<int, int> p = split(i);     mp[p.first][p.second] =  X ;     for (auto &v : frm[i][s]) print(v.first, v.second);   }   int main() {     memset(f, 0x3f, sizeof(f));     N = Read();     M = Read();     K = Read();     for (int i = 1; i <= N; i++)       for (int j = 1; j <= M; j++) mp[i][j] =  . ;     for (int i = 1; i <= N * M; i++) a[i] = Read();     for (int i = 0; i <= K - 1; i++) {       int x = Read(), y = Read();       ele[i] = cg(x, y);       f[ele[i]][1 << i] = a[ele[i]];     }     for (int s = 1; s <= (1 << K) - 1; s++) {       for (int ss = s & (s - 1); ss; ss = s & (ss - 1))         for (int i = 1; i <= N * M; i++)           if (f[i][s] > f[i][ss] + f[i][s ^ ss] - a[i]) {             f[i][s] = f[i][ss] + f[i][s ^ ss] - a[i];             frm[i][s].clear();             frm[i][s].push_back(make_pair(i, ss));             frm[i][s].push_back(make_pair(i, s ^ ss));           }       for (int i = 1; i <= N * M; i++)         if (f[i][s] < inf) {           q.push(i);           inq[i] = true;         }       spfa(s);     }     int ans = inf, id;     for (int i = 1; i <= N * M; i++)       if (f[i][(1 << K) - 1] < ans) ans = f[id = i][(1 << K) - 1];     printf( %d n , ans);     print(id, (1 << K) - 1);     for (int i = 1; i <= N; i++) printf( %s n , mp[i] + 1);     return 0;   }   