func_code_string: #include <bits/stdc++.h>   using namespace std;   template <class T>   inline void checkmin(T &a, T b) {     if (b < a) a = b;   }   template <class T>   inline void checkmax(T &a, T b) {     if (b > a) a = b;   }   int cond = (long long)1;   void _main() {     int n, w, m;     scanf( %d%d%d , &n, &w, &m);     int guests = m;     int usedbottles = 0;     int botid = 1;     int fuel = m;     int used = 0;     bool ok = 1;     vector<vector<pair<int, int> > > sol;     for (int i = (0); i < (m); ++i) {       int needfuel = n;       vector<pair<int, int> > result;       while (needfuel > 0) {         if (fuel > 0) {           int use = min(fuel, needfuel);           result.push_back(pair<int, int>(botid, use));           fuel -= use;           needfuel -= use;           ++used;           if (used > 2) ok = 0;           if (fuel == 0) {             botid++;             fuel = m;             used = 0;           }         } else           assert(0);       }       sol.push_back(result);     }     if (!ok) cout <<  NO  << endl;     cout.precision(6);     if (ok) {       cout <<  YES  << endl;       for (int i = (0); i < (m); ++i) {         for (int j = (0); j < ((int)(sol[i]).size()); ++j) {           if (j) cout <<    ;           long double myfuel = (long double)sol[i][j].second * w / m;           cout << fixed << sol[i][j].first <<     << myfuel;         }         cout << endl;       }     }   }   int main(int argc, char **argv) {     string p =  ../gcj/source/  + string(  ) + argv[0][strlen(argv[0]) - 1];     for (int i = (0); i < (argc); ++i)       if (strcmp(argv[i],  1n ) == 0) {         freopen( 1.in ,  r , stdin);       }     for (int i = (0); i < (argc); ++i)       if (strcmp(argv[i],  2n ) == 0) {         freopen( 2.in ,  r , stdin);       }     for (int i = (0); i < (argc); ++i)       if (strcmp(argv[i],  3n ) == 0) {         freopen( 3.in ,  r , stdin);       }     for (int i = (0); i < (argc); ++i)       if (strcmp(argv[i],  4n ) == 0) {         freopen( 4.in ,  r , stdin);       }     for (int i = (0); i < (argc); ++i)       if (strcmp(argv[i],  5n ) == 0) {         freopen( 5.in ,  r , stdin);       }     for (int i = (0); i < (argc); ++i)       if (strcmp(argv[i],  s0 ) == 0) {         freopen((p +  -small-0.in ).c_str(),  r , stdin);         freopen((p +  -small-0.out ).c_str(),  w , stdout);       }     for (int i = (0); i < (argc); ++i)       if (strcmp(argv[i],  s1 ) == 0) {         freopen((p +  -small-1.in ).c_str(),  r , stdin);         freopen((p +  -small-1.out ).c_str(),  w , stdout);       }     for (int i = (0); i < (argc); ++i)       if (strcmp(argv[i],  s2 ) == 0) {         freopen((p +  -small-2.in ).c_str(),  r , stdin);         freopen((p +  -small-2.out ).c_str(),  w , stdout);       }     for (int i = (0); i < (argc); ++i)       if (strcmp(argv[i],  l0 ) == 0) {         freopen((p +  -large-0.in ).c_str(),  r , stdin);         freopen((p +  -large-0.out ).c_str(),  w , stdout);       }     for (int i = (0); i < (argc); ++i)       if (strcmp(argv[i],  q ) == 0) cond = 1 << 30;     _main();     return 0;   }   