toy.cpp: In function 'void solve()':
toy.cpp:78:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
78 | for(int i=1;i<factor.size();i++) {
| ~^~~~~~~~~~~~~~
toy.cpp:81:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
81 | for (int j=0;j<u.size();j++) {
| ~^~~~~~~~~
toy.cpp: In function 'void file()':
toy.cpp:18:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
18 | freopen("input.txt.txt","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
toy.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
19 | freopen("output.txt.txt","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
toy.cpp: At global scope:
toy.cpp:15:12: warning: 'called' defined but not used [-Wunused-variable]
15 | static int called = 0;const long long MOD = 1e9+7; // 1e9 + 7
| ^~~~~~