foo.cc:178:2: error: stray '#' in program
 }#include <bits/stdc++.h>
  ^
foo.cc: In member function 'BigInteger BigInteger::operator+(const BigInteger&) const':
foo.cc:39:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 if (g == 0 && i >= s.size() && i >= b.s.size()) break;
               ~~^~~~~~~~~~~
foo.cc:39:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 if (g == 0 && i >= s.size() && i >= b.s.size()) break;
                                ~~^~~~~~~~~~~~~
foo.cc:41:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 if (i < s.size()) x += s[i];
     ~~^~~~~~~~~~
foo.cc:42:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 if (i < b.s.size()) x += b.s[i];
     ~~^~~~~~~~~~~~
foo.cc: In member function 'BigInteger BigInteger::operator-(const BigInteger&) const':
foo.cc:52:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 if (g == 0 && i >= s.size() && i >= b.s.size()) break;
               ~~^~~~~~~~~~~
foo.cc:52:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 if (g == 0 && i >= s.size() && i >= b.s.size()) break;
                                ~~^~~~~~~~~~~~~
foo.cc:54:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 if (i < b.s.size()) x -= b.s[i];
     ~~^~~~~~~~~~~~
foo.cc: In member function 'BigInteger BigInteger::operator*(const BigInteger&) const':
foo.cc:64:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for(i=0;i<s.size();i++) for(j=0;j<b.s.size();j++) v[i+j]+=LL(s[i])*b.s[j];
         ~^~~~~~~~~
foo.cc:64:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for(i=0;i<s.size();i++) for(j=0;j<b.s.size();j++) v[i+j]+=LL(s[i])*b.s[j];
                                 ~^~~~~~~~~~~
foo.cc:66:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 if (g ==0 && i >= v.size()) break;
              ~~^~~~~~~~~~~
foo.cc: In function 'std::ostream& operator<<(std::ostream&, const BigInteger&)':
foo.cc:127:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for (int j = 0; j < strlen(buf); j++) out << buf[j];
                 ~~^~~~~~~~~~~~~
foo.cc: At global scope:
foo.cc:178:3: error: 'include' does not name a type
 }#include <bits/stdc++.h>
   ^~~~~~~
foo.cc:183:8: error: redefinition of 'struct BigInteger'
 struct BigInteger {
        ^~~~~~~~~~
foo.cc:6:8: note: previous definition of 'struct BigInteger'
 struct BigInteger {
        ^~~~~~~~~~
foo.cc: In function 'std::ostream& operator<<(std::ostream&, const BigInteger&)':
foo.cc:299:10: error: redefinition of 'std::ostream& operator<<(std::ostream&, const BigInteger&)'
 ostream& operator << (ostream& out, const BigInteger& x) {
          ^~~~~~~~
foo.cc:122:10: note: 'std::ostream& operator<<(std::ostream&, const BigInteger&)' previously defined here
 ostream& operator << (ostream& out, const BigInteger& x) {
          ^~~~~~~~
foo.cc:304:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for (int j = 0; j < strlen(buf); j++) out << buf[j];
                 ~~^~~~~~~~~~~~~
foo.cc: In function 'std::istream& operator>>(std::istream&, BigInteger&)':
foo.cc:309:10: error: redefinition of 'std::istream& operator>>(std::istream&, BigInteger&)'
 istream& operator >> (istream& in, BigInteger& x) {
          ^~~~~~~~
foo.cc:132:10: note: 'std::istream& operator>>(std::istream&, BigInteger&)' previously defined here
 istream& operator >> (istream& in, BigInteger& x) {
          ^~~~~~~~
foo.cc: At global scope:
foo.cc:316:11: error: redefinition of 'const int N'
 const int N = 200 + 5;
           ^
foo.cc:139:11: note: 'const int N' previously defined here
 const int N = 200 + 5;
           ^
foo.cc:318:5: error: redefinition of 'int n'
 int n, m, pa[N << 1];
     ^
foo.cc:141:5: note: 'int n' previously declared here
 int n, m, pa[N << 1];
     ^
foo.cc:318:8: error: redefinition of 'int m'
 int n, m, pa[N << 1];
        ^
foo.cc:141:8: note: 'int m' previously declared here
 int n, m, pa[N << 1];
        ^
foo.cc:318:20: error: redefinition of 'int pa [410]'
 int n, m, pa[N << 1];
                    ^
foo.cc:141:11: note: 'int pa [410]' previously declared here
 int n, m, pa[N << 1];
           ^~
foo.cc:319:11: error: redefinition of 'bool vis [205]'
 bool vis[N];
           ^
foo.cc:142:6: note: 'bool vis [205]' previously declared here
 bool vis[N];
      ^~~
foo.cc: In function 'int findset(int)':
foo.cc:321:5: error: redefinition of 'int findset(int)'
 int findset(int x) { return x == pa[x] ? x : pa[x] = findset(pa[x]); }
     ^~~~~~~
foo.cc:144:5: note: 'int findset(int)' previously defined here
 int findset(int x) { return x == pa[x] ? x : pa[x] = findset(pa[x]); }
     ^~~~~~~
foo.cc: In function 'int main()':
foo.cc:323:5: error: redefinition of 'int main()'
 int main() {
     ^~~~
foo.cc:146:5: note: 'int main()' previously defined here
 int main() {
     ^~~~
foo.cc: In function 'int main()':
foo.cc:147:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%d%d", &n, &m);
 ~~~~~^~~~~~~~~~~~~~~~
foo.cc:151:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%d%d%d%d", &a, &b, &c, &d);
 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:324:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%d%d", &n, &m);
 ~~~~~^~~~~~~~~~~~~~~~
foo.cc:328:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%d%d%d%d", &a, &b, &c, &d);
 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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