Compilare: main.cpp: In function 'void solve1(int, int)': main.cpp:40:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (int i=0, j=1; i<v[x].size(); i++) | ~^~~~~~~~~~~~ main.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | while (j + 1 < v[y].size() && v[y][j + 1] <= v[x][i]) | ~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:75:17: warning: unused variable 'l' [-Wunused-variable] 75 | int l=-1e9, r=1e9; | ^ main.cpp:75:25: warning: unused variable 'r' [-Wunused-variable] 75 | int l=-1e9, r=1e9; | ^