Compilare: main.cpp: In function 'std::vector<long long int> solve1(std::vector<long long int>)': main.cpp:15:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int i=0;i<arr.size();i++){ | ~^~~~~~~~~~~ main.cpp: In function 'long long int solve2(std::vector<long long int>)': main.cpp:26:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(int i=0;i<arr.size();i++){ | ~^~~~~~~~~~~ main.cpp:39:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(int i=0;i<arr.size();i++) | ~^~~~~~~~~~~ main.cpp: In function 'long long int solve3(std::vector<std::vector<long long int> >)': main.cpp:45:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for(int line=1;line<mtr.size();line++) | ~~~~^~~~~~~~~~~ main.cpp:46:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int col=0;col<mtr[0].size();col++) | ~~~^~~~~~~~~~~~~~ main.cpp:50:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for(int line=0;line<mtr.size();line++){ | ~~~~^~~~~~~~~~~ main.cpp:52:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for(int col=0;col<cline.size();col++) | ~~~^~~~~~~~~~~~~ main.cpp:56:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for(int col=0;col<cline.size();col++) | ~~~^~~~~~~~~~~~~ main.cpp:57:30: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses] 57 | if(mtr[line][col]!=(col&1)^1)cline[col]=0; main.cpp: In function 'long long int solve4(std::vector<std::vector<bool> >)': main.cpp:64:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | while(line!=know.size() && col !=know[0].size()){ | ~~~~^~~~~~~~~~~~~ main.cpp:64:36: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<bool>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | while(line!=know.size() && col !=know[0].size()){ | ~~~~^~~~~~~~~~~~~~~~ main.cpp:65:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | while(line<know.size() and (know[line][col] || line == col))line++; | ~~~~^~~~~~~~~~~~ main.cpp:66:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | if(line<know.size())while(col<know.size() and (!know[line][col] || line==col ))col++; | ~~~~^~~~~~~~~~~~ main.cpp:66:38: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | if(line<know.size())while(col<know.size() and (!know[line][col] || line==col ))col++; | ~~~^~~~~~~~~~~~ main.cpp:68:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | if(line==know.size())return col; | ~~~~^~~~~~~~~~~~~ main.cpp: In function 'std::vector<long long int> solve6(std::vector<long long int>, long long int (*)(long long int, long long int), long long int, long long int)': main.cpp:93:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]