Compilare: main.cpp: In function 'int main()': main.cpp:45:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for(ii = 1; ii <= s.size(); ii++) { | ~~~^~~~~~~~~~~ main.cpp:46:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(jj = ii; jj <= s.size(); jj++) dp[ii][jj][i][j] = inf; | ~~~^~~~~~~~~~~ main.cpp:54:27: warning: array subscript has type 'char' [-Wchar-subscripts] 54 | poz[a[i][j]] = {i, j}; | ~~~~~~^ main.cpp:60:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(i = 1; i <= s.size(); i++) { | ~~^~~~~~~~~~~ main.cpp:61:33: warning: array subscript has type 'char' [-Wchar-subscripts] 61 | q.push({poz[s[i - 1]].x, poz[s[i - 1]].y}); | ^ main.cpp:61:50: warning: array subscript has type 'char' [-Wchar-subscripts] 61 | q.push({poz[s[i - 1]].x, poz[s[i - 1]].y}); | ^ main.cpp:65:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for(int lg = 2; lg <= s.size(); lg++) { | ~~~^~~~~~~~~~~ main.cpp:66:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for(i = 1; i + lg - 1 <= s.size(); i++) { | ~~~~~~~~~~~^~~~~~~~~~~