View Compilation Error

0_0_17393975_1755.cpp: In function 'void cal(int, int, int, int)':
0_0_17393975_1755.cpp:36:37: error: expected ';' at end of input
    sum[tag[r]]+=(pai[i+1].x-pai[i].x)
                                     ^
0_0_17393975_1755.cpp:36:37: error: expected '}' at end of input
0_0_17393975_1755.cpp:36:37: error: expected '}' at end of input
0_0_17393975_1755.cpp:36:37: error: expected '}' at end of input